Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa01b6ac086dcbc7…

MALICIOUS

PDF

81.3 KB Created: 2021-05-31 12:06:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 50eba58320e7387189c3b26a4d65eb52 SHA-1: 2d5df335f003a85a9b3b63f5cc15d74d9bcedfbb SHA-256: fa01b6ac086dcbc7cf212820aef95ce4a789b8b90d3be0bc266b32fff9b8badb
156 Risk Score

Malware Insights

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

The PDF document contains a lure related to 'free Robux' and embeds multiple external links, including one to 'bologen.ru'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or phishing operation. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or scam attempt.

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://bologen.ru/strik?utm_term=how+to+get+free+robux+without+download+any+apps+or+survey PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4482009/normal_602949766935e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490528/normal_600ca46a26cec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428054/normal_60260d9655769.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493888/normal_6063ccaee39f5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365621/normal_5fe1182e803c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444114/normal_5fe0f13a8b518.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453734/normal_602922cb7acd2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383928/normal_5feda12adc722.pdfIn PDF document text
    • https://lulipexo.weebly.com/uploads/1/3/5/2/135294167/9be71025.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384144/normal_5ff1af724f129.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451927/normal_60243897be3e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417406/normal_5fdd6f76ee323.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467286/normal_5fe878bdb29ab.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4392667/normal_60b468f89017e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455185/normal_60388f828c17f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407988/normal_5ff3008c16352.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501361/normal_600fa2c352188.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/4deb313e-6b92-495c-9035-c8de6f633314/67288297724.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/593e15b6-8c52-4416-9613-be6220b39687/electrical_engineering_drawing_book_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2eaa0043-b117-4b27-ad10-498d2ac76c48/5530975653.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_off0000fdfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFE 5728 bytes
SHA-256: bf8a8423ef38b92e18c2fdeaf53266ef0b8c64113231fcc4aa16658da9069466
font_01_sfnt_off00011192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11192 11168 bytes
SHA-256: 5dc7080b27ea241eae703276ba4a269755682d67d7ed66d048d6765d4af3bb8b

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