Malicious PDF — malware analysis report

Static analysis result for SHA-256 a17fd6bd1c709ac3…

MALICIOUS

PDF

86.7 KB Created: 2021-06-26 00:56:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0a9366d18b321187d2d89d865db1608f SHA-1: 79d84ee3ff029619c1e8983e613a7852055e9235 SHA-256: a17fd6bd1c709ac3cfd6c690bbf640b208bd4f4854427f264107ffaf0534f8b2
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document contains lures indicating urgency and payment, consistent with phishing or scam attempts. Several embedded URLs point to compromised WordPress sites hosting PDFs, suggesting a distribution mechanism for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 9

  • 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.
  • 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
  • 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 http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c82cb46db---70335624240.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099aa3270ccc---41921357237.pdf
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/2mg9s7oiqn97946olgbjt6asq2/96773586323.pdf
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/64892955328.pdf
    • http://arohitourandtravels.com/userfiles/file/sofatal.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/fa07bb07ce0358332720aa83bacb7044/jelovegeb.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/7d8733e4f76feff083fb30b62d9e42a4/43981209122.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/f69ea30cf9d4f61411a3a2bbc8a2e816/gigux.pdf
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7e429dff3---jodakekixof.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c3c26c934c---ponezijivalulaladagi.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/04e8b042ba16221e84f895d8c3a4d640/77105333870.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16079a9f6d5506---pozaniratuveginevope.pdf
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/0bc5519c71d69a467b4fad3fcd771d6d/98166876341.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/2fc728376587e4b70f722d8cc0c5d491/wekibutuk.pdf
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/c7778cab7f563cbb2124472cbf5ec4f0/lemopatori.pdf
    • http://charivne.info/images/file/90257948631.pdf
    • http://dzstock.com/Upfiles/file/joronojebawiwotonebonaw.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8e8e3545fd---18325346168.pdf
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16097ad0a3d087---suwupevotuwalufurixarug.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096d98900901---zevumuw.pdf
    • https://resulgame.com/calisma2/files/uploads/66883711292.pdf
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/3dcdkkneql9p3vdajm117s8b22/pegob.pdf
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1608d78f6aca70---motaluxobufijopafu.pdf
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/5fd3ab497bb927f169b8357ee2db2a5c/mafusiwujudi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=pdf+of+application+letter
    • 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_off0000ea9c.bin
6dc216ababd698c9e5d8eb5483ba10d7e7c430a9f2c273583feb1709865f2c5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9C 19780 bytes
font_01_sfnt_off00011d87.bin
a946b87773f91b8efc2ebee1006f2ada126a34340326ea8439af0e2a79f468ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D87 10444 bytes
font_02_sfnt_off00013549.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13549 16792 bytes

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