Malicious PDF — malware analysis report

Static analysis result for SHA-256 d577ec047156ba60…

MALICIOUS

PDF

83.8 KB Created: 2021-08-04 12:05:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b007a20a25c3a151092d30eab54d7d4a SHA-1: c1420c2e46dc73628df406857e74fe21861129c4 SHA-256: d577ec047156ba60ed15cde845648c8150ffe2391b2800fea44329ead27d5581
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites, potentially for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160db9f53ddd5e---rerenu.pdf In PDF document text
    • http://poorclarescork.ie/images/lavegorezodifelusuxe.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a61d0be1253---94939947868.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/tb86rn9lkif9ds9ni4phdku9mm/rorilatuwok.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/2e831bee9b872cd6ca7edef591245e4d/wonubonovada.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/35o6ch8b6rm69gvmd9jvdj6530/kiwitekasujutufibalu.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/df9fsmi6ofb3n7j0lp7m973530/tixenijiba.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/160894c9bc5ead---xobudate.pdfIn PDF document text
    • http://kientrucsangtrong.com/plus/files/74760143245.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a33509a5386---86391381796.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/71111737bad7dc4b294bd66b18897949/38054929452.pdfIn PDF document text
    • https://gamaconsultores.cl/upload/file/50047064814.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/nt2up575odj0vtaclvjl96lam2/welalolupeketabosawugut.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/44720137194.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/16015176921.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/1i7ps37k5vvgjsafdahmbr5tq1/85734899164.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/o66tbgl44e72h25f7crhmo9s11/moladezebemujifafavab.pdfIn PDF document text
    • http://timebank.ru/sites/default/files/photos/pagefile/mofafovavepavalemar.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/21852591337.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/f3d7f44a1c189d3b066bcce22bc8f45b/99311722010.pdfIn PDF document text
    • http://teifsepahan.com/files/file/loxulixisabarununif.pdfIn PDF document text
    • http://orthocarecentroortopedico.it/userfiles/files/35221990874.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/68ijrldfvgialbkg79uvj4tclr/54495929102.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=10.s%C4%B1n%C4%B1f+matematik+test+%C3%A7%C3%B6zPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/abcef7f23f0c08d1eed7c33221772fb0/povibaworasexaberavomawe.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_off0000e266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE266 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7D 10864 bytes
SHA-256: 4e374eeb8b2e651ed3147822375b577f18d392eed52c6220181e548b3fa8c3f4
font_02_sfnt_off00011384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11384 17984 bytes
SHA-256: 49bbf3c73a1744234e225cfb388302f72a3075f36195fabdedb227415360efa2

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