Malicious PDF — malware analysis report

Static analysis result for SHA-256 8571312d752c24ce…

MALICIOUS

PDF

144.2 KB Created: 2021-06-29 10:34:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f490cd11745e0d5060127a933b65c2f9 SHA-1: 31f487fc1966603128eb01e9c68b5fca7ad2c4f7 SHA-256: 8571312d752c24cefecb4665d6c4aac19ba3fa2fe86f17f97e98c04cec7c9445
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are hosted on compromised WordPress installations, suggesting a link farm designed to distribute malicious content. The presence of advance-fee scam lures and the ML classifier's high confidence score indicate a malicious intent to deceive the user. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing and malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://irlanc.ru/uplcv?utm_term=can+you+sell+vehicles+in+gta+5+story+mode
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/c3a12fafdb320e96bf7938167bfa444e/gumabidexevuwemakululi.pdf
    • http://autoshiftbid.com/fckeditor/userfiles/file/tawuvalezep.pdf
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/421faec2544c3ed91dc83f2b8894c5c7/tugoritojob.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a2300a10995---dasaxedawir.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/d5hgha4dgeigbjeun734ornu52/1863141714.pdf
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/agcq8rv86u51uvipsi3ei1nlon/sozigokepawikezere.pdf
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/7e27574756f62b1842bc1c119d322a31/1831991536.pdf
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16074fe9176472---wisawozizekutowe.pdf
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c00c474d127---wanisifafigalabaludox.pdf
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160882b3952f2c---luzusofajixoleragafokev.pdf
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/229319e36067a1643063689c9c91c9e1/41228550618.pdf
    • http://ourjamesfamilyhistory.com/clients/1/14/146a9f92d0a296c7c29e793db058bb30/File/72050266077.pdf
    • https://noticky.net/akce/fotky/file/bawaka.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a18cc28b9---xofugewazem.pdf
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/ehqktm1u72u2vmflna5ojc0449/pibeseduwuforofedodo.pdf
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/6700a204f0131d14c76e59257c5d9bef/mamoguzul.pdf
    • http://uro-medical.pl/zdjecia/fotki/file/kupolu.pdf
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/01ea1ab8431bde128aa19ae30cd59e7a/54390636048.pdf
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/eds1jrruch5su299aukshiu6q3/82856571282.pdf
    • http://caudafotografia.com/userfiles/files/lojojurajemivegefuno.pdf
    • https://jahanchart.ir/data/files/file/481959466.pdf
    • https://gotoko.com/cmsv2/upload/files/digituribubez.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/8oigr4uc7i2n6gmmo15rqoi395/lokejowaxuwozukobix.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d10c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D10C 16792 bytes
font_01_sfnt_off0001e91e.bin
166010cf7297a4c15a2402bef0fec8ab8d952b5029d22556f47060b19b92fc20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E91E 18172 bytes
font_02_sfnt_off00021924.bin
0ccd2f5552d1b8f253a8c4a00cb226d9760e281bc4f1d15566c446e50d843604		 pdf-font-stream PDF embedded font (sfnt) at offset 0x21924 11260 bytes

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