Malicious PDF — malware analysis report

Static analysis result for SHA-256 14de341a30c969e7…

MALICIOUS

PDF

95.4 KB Created: 2021-06-26 08:37:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 8807d62ae0b0973ccc06a0ffa602630a SHA-1: 4e3f2d58c63ae838dd7dfc023c238c992bd296f4 SHA-256: 14de341a30c969e7d1781d67fa697f61fd43628af28a04042894aafbadc4e0e4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other disposable hosting, likely to redirect users to phishing or malware distribution pages. The presence of external URIs and link farms suggests an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9786

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://huntic.ru/uplcv?utm_term=best+free+app+for+counting+macros PDF link annotation
    • https://hotelmitrutarija.com/uploaded/files/87734445905.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/80vtsudnpe1kok92f3l2fbd266/34040036544.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/eqkg7v7a5sheb697v1jv033eu7/79532039677.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160726b485cc9b---23619453622.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/pekf0mu418oh2q81lq2hmt2876/10236260665.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/jibapizowoma.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/sof81c5b0qqjmbh8v5k4ck7244/basulosaz.pdfIn PDF document text
    • http://digifast.cz/userfiles/59437983440.pdfIn PDF document text
    • https://mosallaesf.ir/uploads/ck/files/28576856060.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/cbf040edba585a31d015a4c804e1ac5a/negomadevalovukutifukadaf.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/98847867860.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccd68286f3---nidukopivudujatap.pdfIn PDF document text
    • https://agatanorek.com/files/file/disobakiwat.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/41md4o6g1cp6hpe54uup9s6phv/32420590141.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/b8b5fc466711c3b2682d08ab97323d3a/95199362257.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0870e5da06---70195301343.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/1586500ee3d9bb80f1b65619613a5b11/mowof.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/tijewibegagud.pdfIn PDF document text
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb7cb60435---gosabilevizejorawo.pdfIn PDF document text
    • http://chapelguild.com/images/usr/lomebopagedekesulolaxi.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/5d0856a519b786969c731b1b66243f03/gusurakokexalepav.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/ba96636d4bd6094f0dfe7ec169ddca3e/fumesuxuzakowigiku.pdfIn PDF document text
    • https://forumhrdbekasi.com/webroot/userfiles/files/kidim.pdfIn PDF document text
    • http://laser-piskovani.cz/democms/userfiles/file/29693652852.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/62233649499.pdfIn PDF document text
    • http://mientaytourist.com/uploads/files/jivigutufugubir.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB54 17572 bytes
SHA-256: c68b95c530de3f4444afa24d38cf0188d68a809163695f616bd8da0f2d038a46
font_01_sfnt_off0001293b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1293B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14152 10928 bytes
SHA-256: d16bd8513c0480e425f722b038bb8ed836ffca44ce771e68fa78f0e0ae595782
font_03_sfnt_off00015aac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AAC 16076 bytes
SHA-256: a788292cca142aeed5da50f6fe930e2a2735a94866157f12b187defed158ae4b

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