Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e6416eaacd874bc…

MALICIOUS

PDF

89.4 KB Created: 2021-09-14 14:06:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 311aa4f046925328e2bce55d75026d58 SHA-1: 9261990d0e3e705012d8f0e3df25835fd26f99c5 SHA-256: 8e6416eaacd874bcc3e219661dfe20cf97e40ca099a4168e8195da8daa10aa5f
176 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It contains numerous URLs, many pointing to link farms on disposable hosting, suggesting an effort to obscure the ultimate destination. The 'SE_CALLBACK_LURE' heuristic indicates the document may prompt the user to call a number, a common tactic in tech-support scams or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 7

  • 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.
  • 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) documents that carry no urgency or charge/dispute escalation.
  • 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://pixomot.ru/uplcv?utm_term=music+stops+playing+when+phone+locked+android PDF link annotation
    • http://contua.org/userfiles/file/12850291754.pdfIn PDF document text
    • http://ventima.ru/userfiles/file/kuxejelijit.pdfIn PDF document text
    • https://searchlink.org/userfiles/file/87546473412.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16139d5b7da822---zezajiralakuwulisekadij.pdfIn PDF document text
    • http://thesecurityguardunion.ca/userfiles/files/8329477548.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16138028a9a4ad---41765399051.pdfIn PDF document text
    • http://trineckevzdelavani.cz/webpagebuilder/ckfinder/userfiles/files/38142377790.pdfIn PDF document text
    • http://autodilygood.cz/files/file/welil.pdfIn PDF document text
    • http://nickels.design/ckfinder/userfiles/files/regozetab.pdfIn PDF document text
    • http://multi-accueil.fr/ressource/site-image/files/duzivitaxunixibimovu.pdfIn PDF document text
    • http://rklatex.com/userfiles/file/nuxurufuzun.pdfIn PDF document text
    • http://boonfagrandhome.com/user_img/files/kiruvesevipex.pdfIn PDF document text
    • http://northmarking.com/userfiles/files/16583557957.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/pipam.pdfIn PDF document text
    • http://xn--2e0b95unoa536adofm5h.com/userfiles/file/54976720246.pdfIn PDF document text
    • http://valdhans.cz/userfiles/file/konejakaxumed.pdfIn PDF document text
    • https://warungmimpishio2.com/contents/files/48972348069.pdfIn PDF document text
    • https://foundationkuzmanov.com/files/dipubetaged.pdfIn PDF document text
    • http://studiocinti.eu/userfiles/files/voxajubuwin.pdfIn PDF document text
    • http://rujiahk.com/uploadfiles/file/7511228305.pdfIn PDF document text
    • http://quincy.pl/ckfinder/userfiles/files/48948687762.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/dbd1ae8642ee6e6ce15466cd190eeab0/lojofavogulamerovejobaxid.pdfIn PDF document text
    • http://mikomisushiwc.com/uploads/files/15170021485.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ebe13617a1---puveburezoweduwepibapuk.pdfIn PDF document text
    • https://khambenhxahoi115.com/images/files/gupugiposokerukere.pdfIn PDF document text
    • http://ventilyatsia-v-sochi.ru/ckfinder/userfiles/files/towuvotidemopuninalibuvu.pdfIn PDF document text
    • http://www.immo-uno.com/ckfinder/userfiles/files/35529415173.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f46b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010c82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C82 11176 bytes
SHA-256: c6d8349da56d2dd3d28da6a99ae9eb20561fd8fb575fabf32348d917f4f845b3
font_02_sfnt_off00012680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12680 18628 bytes
SHA-256: fb8edf492f6231bdb419821ecacb1e60a4ff7e3132a8d77bcc9f716b602a28dc

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