Malicious PDF — malware analysis report

Static analysis result for SHA-256 180d609e13b8b1aa…

MALICIOUS

PDF

84.9 KB Created: 2021-06-20 22:33:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5097a53f62cbf309743bce08e4e8232d SHA-1: 05f53114a77078a2cde8bb59d6c861cfe5eb2e13 SHA-256: 180d609e13b8b1aa6a28dc548e2a46cda856922b340cd2b4d15398df169690e7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external resources, many hosted on compromised websites, suggesting a phishing or malware distribution attempt. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a tactic to leverage search engine optimization and compromised infrastructure for distribution. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160bb5b30c7c42---rejopevurako.pdf In PDF document text
    • https://harrisitalia.it/uploads/file/mikijetimopawakudomaz.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/fezixidigonozuxe.pdfIn PDF document text
    • http://stewartreunion2020.com/clients/2/2a/2a0d9dcdd57715375c9f4393c24df0f2/File/19333482096.pdfIn PDF document text
    • http://randalljroutson.com/clients/44711/File/39383783258.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f599d2096b---woxonoroduranakigaz.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/jutigupegud.pdfIn PDF document text
    • http://tourister.kr/userfiles/file/wugudewilesepitobujeju.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/a7e7737de0192d35149607d1d017ff36/senitogagugobakid.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092e5c50be42---53428639499.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/sapovimububada.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f243b8391---somapotafasiromedor.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/5c6eb463a02d7df54fc46ba874d2a40c/rofuzomaroveval.pdfIn PDF document text
    • http://cerescommoditiesltd.com/Images_upload/files/pokasimapulisefapunajus.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/vune536tj0oi0buukhge8r9tkd/54301737617.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/aqojm7n6jqbhpdqug9qbimmbb7/94306907677.pdfIn PDF document text
    • https://samowar.ch/upload/file/454387559.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=dinosaurs+before+dark+pdf+downloadPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F16 5332 bytes
SHA-256: b8cc1ac5ff5add292a503d91d0374293845b5414e8da8b5dcfc2b809cd2c29eb
font_01_sfnt_off0001215a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1215A 11156 bytes
SHA-256: 1f3ea74518cca5c2fa4a35d227529f6f0a44e8212cb16c54276c715a518509b9