Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf914e3f5f4de5ad…

MALICIOUS

PDF

77.8 KB Created: 2021-09-02 16:27:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8ed52cf7601c8a75a26185aebc011e94 SHA-1: becf256bff33a2088f9115898b4f767909ad8cc1 SHA-256: bf914e3f5f4de5adbafbe752c7dff6956ee2947241885a8d14ba3ceadeb4708f
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, indicating it likely exploits a vulnerability or serves as a phishing lure. The file contains numerous links pointing to compromised WordPress sites and other domains, suggesting it's designed to redirect users to malicious content. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/wesogetelinofabideze.pdf In PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080123f6cd12---66205933103.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/xekilebuvefizis.pdfIn PDF document text
    • https://betentour.com/sites/default/files/file/lomulemudarajegamorol.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c91d0f129---xowebar.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612b3e6fc1683---pafalesu.pdfIn PDF document text
    • http://f-kcc.jp/user_data/userfiles/files/jiterobezagobazebe.pdfIn PDF document text
    • https://nada70.org/userfiles/file/28548264029.pdfIn PDF document text
    • http://leadershipcareer.kr/fckeditor/_upload/file/potoxavova.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609f5188a75ae---wokovujodebunil.pdfIn PDF document text
    • http://gostinica-domodedovo.ru/files/lekowuvurugamewazeki.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090efc78e8ee---xozewilawidap.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607deb882b5ef---32053666522.pdfIn PDF document text
    • http://thrifty-uy.com/files/others/12453881338.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/nigeg.pdfIn PDF document text
    • https://www.luthier-auxerre.fr/ckfinder/userfiles/files/33362429602.pdfIn PDF document text
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/damunedemat.pdfIn PDF document text
    • https://anglarill.net/userfiles/file/golixivux.pdfIn PDF document text
    • http://lubrifianti-auto.ro/files/file/jakesul.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/145d72554257871cc59447b17c8e783d/92982734180.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/f09aca885d955525c825ca14fad07a76/pinef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=the+sanford+guide+to+antimicrobial+therapy+2018+pdf+freePDF 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_off0000c844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC844 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e05b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE05B 11888 bytes
SHA-256: ffd52f41867a894fad8cc29a68cb9629f37f6b314340ad8a2ffbf254083321e6
font_02_sfnt_off0000fc58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC58 17212 bytes
SHA-256: f4cced3c39e84ba8d96d61858cf17154bc90f08a87a653d9417f9fc523e53f34

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