Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c7c9bb6d3c60fa4…

MALICIOUS

PDF

78.5 KB Created: 2021-02-28 00:05:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ec1fda48c3f85df0942c06e904988513 SHA-1: 2620b1d76b55f9ae4f2954e30908329eedbd6116 SHA-256: 1c7c9bb6d3c60fa4fb5b934904b3a33720bf13ed9121e509fc0bcf45b9a79db1
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, suggesting a malicious intent to redirect users. ClamAV detection and ML classification strongly indicate this is a phishing or malicious PDF. While no scripts were extracted, the presence of numerous external URLs points towards a phishing or SEO manipulation attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://kuzutuzo.ru/strik?utm_term=partially+hydrogenated+vegetable+oil+in+food PDF link annotation
    • https://cdn.sqhk.co/senepaderu/hjemegf/ivanka_trump_husband_name.pdfIn PDF document text
    • https://suludexa.weebly.com/uploads/1/3/5/3/135314517/leritefik_powowiwiluwim_jedipawajoxuzep.pdfIn PDF document text
    • https://gepavemu.weebly.com/uploads/1/3/4/8/134861499/wufiwatewegipapuzin.pdfIn PDF document text
    • https://cdn.sqhk.co/fiseguvugele/ticJUif/torn_acl_pain_scale.pdfIn PDF document text
    • https://salexutoxor.weebly.com/uploads/1/3/4/7/134761189/zofetamo.pdfIn PDF document text
    • https://cdn.sqhk.co/sobupepokor/jfAjgiW/glass_bottled_water_delivery_los_angeles.pdfIn PDF document text
    • https://makojinoguj.weebly.com/uploads/1/3/1/4/131406607/7778846.pdfIn PDF document text
    • https://cdn.sqhk.co/zifiguwosu/jihjOFI/fruit_ninja_apk_old_version_uptodown.pdfIn PDF document text
    • https://cdn.sqhk.co/xexanodu/ijoUUts/41714914799.pdfIn PDF document text
    • https://genunilime.weebly.com/uploads/1/3/4/3/134344847/9447708.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/28027196564.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/87640028661.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/poisoning_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/cluedo_junior_replacement_sheets_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/82841248405.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/vunudinojudopapekolinusiw.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/vekaxikuxulogawuwugife.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF633 5296 bytes
SHA-256: 72dc283a004527f905421d9acd140bf3ab2695d35b5b4879b84ec03a88f6c482
font_01_sfnt_off0001083e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1083E 10648 bytes
SHA-256: b8ae054bffdb1ea0cd17e0fdd64e4a23551abd322af9f49d5abe462906bf948c

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