Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d779d538214a48d…

MALICIOUS

PDF

91.8 KB Created: 2021-07-17 07:11:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7b9c7263951dfbdd16dbbf4b26c8a8ae SHA-1: dc76044dbf5407ab1808263773805edcab8a13de SHA-256: 0d779d538214a48df4a6cdbd853bc4ffa2da46a810db00891294ad322deed79d
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier, indicating malicious intent. Numerous embedded URLs were found, including links to compromised WordPress sites and raw IP addresses, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the nature of the embedded links and the heuristic firings strongly suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/1339217660b8cbdf71a3be77161b3124/59490206762.pdf In PDF document text
    • http://dighakanchaninternational.com/FCKeditor/file/49792992332.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/ba955f58ca8789cbd855f258369977f5/sutuxa.pdfIn PDF document text
    • http://metalzilembo.it/userfiles/files/21117755331.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab2965f0114---97877303285.pdfIn PDF document text
    • https://jetaime-shop.com/files/weduvoramebugavafegu.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c6fa5e89ec1---kezufodefam.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d90a43e4b---26672544333.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/85dc2e647123f799c97f1f010a04582a/29264933234.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/v3gt4bcqlnui8etpuup0o2rhj4/xokeritoregazotapo.pdfIn PDF document text
    • https://o2opr.co/userfiles/files/51415732523.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c39c160e689---lijepagorosowoki.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607be3b3c21b3---nopubowodosikujezobovuxan.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d623d27d533---popazowedaz.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/48238268872.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c99d17a25be---loviri.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16095e8d3ce612---vuzavuzubif.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/60995668026.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/10684087014d3845ad412d8c6820080c/68694110075.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607526518b304---10117186068.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aea0d72d07---69595599758.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/tosivepew.pdfIn PDF document text
    • https://markeishahall.com/wp-content/plugins/super-forms/uploads/php/files/ab1062908d748e0e982bde6a5202a6b2/segegofalofedezako.pdfIn PDF document text
    • http://140.121.176.106/ckfinder/userfiles/files/21390571215.pdfPDF link annotation
    • http://security-m.jp/tool/images/file/buleli.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/ea5e7ff3ede5b2bc5aa37851f1e4fec9/61426573621.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=are+manuals+more+reliable+than+automaticsPDF link annotation
    • 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_off0001051a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1051A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011d2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D2C 16904 bytes
SHA-256: 359c085a6b834d3868342bcc924cce37aa5e219216d636aa7685bdf65fa45ff7
font_02_sfnt_off00014913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14913 10716 bytes
SHA-256: 8c57b161ad710baa118bec657e7cb672881991e8e012f2718a0a023419133df5

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