Malicious PDF — malware analysis report

Static analysis result for SHA-256 29a3f008eab67927…

MALICIOUS

PDF

121.2 KB Created: 2021-08-16 12:12:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: b1c4445028cc57633c819da8f7b53689 SHA-1: b0a94b7352bb539610ebd5a0a79213a433367183 SHA-256: 29a3f008eab67927763bd7c575c14d6490f36641a6814c16c08e8a41c144b9a9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was identified as malicious by ClamAV and an ML classifier, indicating it likely contains malicious content. The PDF exhibits characteristics of a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting domains. These links are designed to lure users to potentially harmful content, aligning with a phishing or credential harvesting attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

Heuristics 6

  • 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.
  • 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://driftwoodcc.com/userfiles/files/77214887882.pdf In PDF document text
    • http://gawhs80.com/clients/873705/File/79524907995.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d52a35ede4d---dewinuzilafokulurot.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/8e17081e962fff482fcfaeebdb4a906e/6860910305.pdfIn PDF document text
    • https://soudurelauziere.ca/upload/editor/file/xazetebevewapuwisifafov.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b79e5911fe5---lozim.pdfIn PDF document text
    • http://bjjiffy.com/upload/97110419737.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/xigowodanawapojuvaf.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9d273e1f6---36648402974.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16113e26f54598---30003676059.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/181b0aad053bfd18871e1ef01adbd734/79019440803.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072fd2791214---33737167480.pdfIn PDF document text
    • http://riverla.vn/uploads/userfiles/file/26364349107.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160be43efd3d90---27231347086.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/titoduvosodizofaka.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a60982d9b1c---segox.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/16096abae2296d---26109083571.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/1594873d212d146b607a3079de67e600/46398694684.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bff64d69a00---48026149277.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bf90811610f---tetiwewamevefag.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/57237888179.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/318238ba770bbf5997d630f2ff04a2f1/94165360322.pdfIn PDF document text
    • https://uleshuzataruhaz.hu/files/file/puwenazeka.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/060202211218.pdfIn PDF document text
    • http://loveforlungs.com/clients/a/a9/a9a80f3a93b7553e0860ec1960497db0/File/33842280229.pdfIn PDF document text
    • https://chp-travel.ir/data/file/dofefubo.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16072c233cf4d6---wunofop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=la+la+land+mia+and+sebastian%27s+theme+piano+sheet+pdfPDF 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_off0001724f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1724F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00018a66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A66 10796 bytes
SHA-256: 8c755c37d052f2cce06bc1dd02e30bf5047de71ae815032c361c403a9467de6e
font_02_sfnt_off0001a2c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A2C9 19500 bytes
SHA-256: 6f84488808852811597ad612e1b30f62a46979ff601c43177a16ed3868e17a2a

Open this report in the interactive analyzer, or submit your own file for analysis.