Malicious PDF — malware analysis report

Static analysis result for SHA-256 12cc6068d58aba45…

MALICIOUS

PDF

326.7 KB Created: 2021-07-24 09:20:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 4ab16400507badc16afd55defe81fedb SHA-1: 1bebb459299dc8e8b29c58330543547a8b3d26e3 SHA-256: 12cc6068d58aba45fc4f6406e1437568698793d75a3c1f5322107d3627d40707
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. The presence of link farm and SEO redirector heuristics, combined with embedded URLs pointing to compromised CMS upload storage, indicates a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests it is part of a lure for a fake invoice or payment, consistent with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9084

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://adlinefor.com/home/webagen/public_html/korn/data/file/39577574211.pdf In PDF document text
    • https://tiguan-wiki.ru/file/70235424033.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16083f3e96fc3e---50615306787.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/4836226015.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/7a859a0bbe5841da47e4fbeec1b60002/janosegegexututen.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/fugopezipivipusozif.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/8df7b45eca0dad9472314b39510eb0ad/rolixadidabudilirepesegi.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a7acffbfe49---duxemijobivajet.pdfIn PDF document text
    • http://chataphan.com/file_media/file_image/file/56698906161.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/11jv1u9bj7hiner1560ikhegj8/76666811.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c99f2cd0f8a---xibukamememiromotufofe.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/6hdmiar4cjtta3viusoo7k740s/19244265275.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/e19784416136dc6b4cbc41cc8400bbc0/9508651711.pdfIn PDF document text
    • http://ck-tct.ru/userfiles/file/wamazaje.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1607544589be00---narubodukobudebi.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d20efec5a0---43162148599.pdfIn PDF document text
    • http://meyergarden.com/ckfinder/userfiles/files/nejedumeli.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3cdcf2c89---jomakewupofosugelijobumap.pdfIn PDF document text
    • http://ipmarketing.net/userfiles/file/musolebiruferezufidowozuf.pdfIn PDF document text
    • https://solo-enoant.com/content/files/files/96255161158.pdfIn PDF document text
    • http://co-wemart.com/careeruserfiles/file/49069755809.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/r915ihn4gjg1r1ogecl1ctscgk/faxulazotex.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/d3eb2d498a6ab4e8d5929260d2eca5cb/nikelul.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/db40ebc9f64d0108d44cd2848c4d42d7/nugenilovuzamidafow.pdfIn PDF document text
    • http://pauseforserenity.com/clients/1/10/1002a5d8b3740fc7390aa1937d1ec3ed/File/rusufasitakakefijifobob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=advanced+accounting+1+guerrero+2017+solution+manual+pdf+chapter+14PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00049f8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49F8B 11636 bytes
SHA-256: c83ce2bb0ec5eed3a2263b2ab5a3263308f8766665aafd6f2a8423e1107f1aaa
font_01_sfnt_off0004bb06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BB06 19708 bytes
SHA-256: e67fc8ac56a66a80ac6d62b433a0cb0aa96164fc18b59371f38222da42dd5a6d
font_02_sfnt_off0004f001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F001 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1