Malicious PDF — malware analysis report

Static analysis result for SHA-256 c650943a233a42db…

MALICIOUS

PDF

68.9 KB Created: 2020-11-17 23:31:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c66a15a73e1261c7ddaea6d79d64c058 SHA-1: 7f6303d5b86fca534c131b70279e673023a9719d SHA-256: c650943a233a42dbba462e297bf058f56bd343395327ddbbd80618e3c1ac6f0e
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a site offering a 'qhsusb_bulk driver lenovo' download, suggesting a lure for phishing or malware. ClamAV and ML heuristics also flagged this PDF as malicious, specifically identifying it as a phishing trojan. The presence of embedded URLs and the nature of the links strongly indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/strik?utm_term=qhsusb_bulk+driver+lenovo PDF link annotation
    • https://fidegobopoj.weebly.com/uploads/1/3/2/8/132815019/a5d51ee5e2df75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366344/normal_5f8d69414cc08.pdfIn PDF document text
    • https://novebeze.weebly.com/uploads/1/3/3/9/133997241/6885402.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/28728629-f4cf-4145-9048-4b9e6a655f14/mtg_white_deck_tips.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1476f9cc-b985-48f2-95f4-180add443c2c/birabanuripuwalekunapimap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4be307b5-20bc-4b51-95d5-5ee8b69ba810/pupinali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c24e432-db9f-4ed5-bf68-163fe82b31ab/42592483737.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/tamamotafimaxiru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eef84703-745a-4104-b43d-c0fe0d2c5087/country_code_011521.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f094ebb7-22bf-4853-b874-fdbedfe5bfe0/56351181163.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/512a6027-7b68-4cdc-aae8-ff877e61eb25/your_momma_so_fat_nutty_professor.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_off0000d0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F9 5056 bytes
SHA-256: 8b08f5422d681c3301e437360efed0069f5457045e00cfb24b0da07db1ffc000
font_01_sfnt_off0000e22d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22D 10968 bytes
SHA-256: 03ac6a396e74cb82c0eff2bafdcf5c754efef6333541ae698b444b4172fcb93f

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