Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa40e6a9bc1703de…

MALICIOUS

PDF

63.9 KB Created: 2020-12-14 22:41:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 44f8fb2a87405edab46c79c7f36e683e SHA-1: 7a11e9ea82460c6ba2d5d79f555e24e2ac6c8ce3 SHA-256: fa40e6a9bc1703de4eb488bd8aaefcd8ba6f9fe28759c75c74e3510a902ae814
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly and other free hosting services, indicative of a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://traffnew.ru/strik?utm_term=escambia+county+clerk+of+courts+traffic PDF link annotation
    • https://magojumenuta.weebly.com/uploads/1/3/4/3/134361537/2035851.pdfIn PDF document text
    • https://bupaduzisi.weebly.com/uploads/1/3/4/4/134475958/5713584.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504922/normal_5fd6370d21f5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418178/normal_5fbeda3eb6257.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464077/normal_5fad11db3b042.pdfIn PDF document text
    • https://topagolidokade.weebly.com/uploads/1/3/4/5/134502990/sojazorafufokinoxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365638/normal_5fa6a0e513ff7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/95dd7539-cabd-4862-9d49-18d8bdc95f39/hp_pavilion_061_driver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee37da85-0259-45b9-a51c-f54f37232e13/paul_crouch_jr_leaves_tbn.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_off0000bce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCE7 5292 bytes
SHA-256: 8676b418b020026ff1dffabd276dc66e197b8bad0a85d24f437de74d0b607161
font_01_sfnt_off0000cee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE3 10524 bytes
SHA-256: 43ccc1227fe9812129bc919e88e4ab87272677434adb6e4c3b0d1c2a62740225