Malicious PDF — malware analysis report

Static analysis result for SHA-256 61be47b2b87fb2bd…

MALICIOUS

PDF

66.8 KB Created: 2020-11-25 23:25:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 4fcce233592fbbab0c4d6951560f13b3 SHA-1: 221aeae66842d5d167ddabc83787be22c1955626 SHA-256: 61be47b2b87fb2bd2bd77829a345cc1dae2b11bd58afe98cdda25615e3616fca
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to 'stock ticker symbol for google', suggesting a lure to a potentially malicious financial-themed website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?utm_term=stock+ticker+symbol+for+google In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393779/normal_5fb9a5272dc1e.pdfIn PDF document text
    • https://jedarixires.weebly.com/uploads/1/3/0/9/130969076/2766802.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/rebomedug/waviwabuvevugeki.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/72276297776.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4733321-ed95-4beb-b4b8-9e20d72a0eb7/livre_le_secret_rhonda_byrne_gra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec857c03-88d6-40e9-8822-587797da4413/30495211766.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/david_berg_artist.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/androids_saga_dragon_ball_z.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aababa02-49fa-427c-9be3-ad50935d410f/54319911800.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba0a99eb-e5c8-483d-b764-764b933f3c93/42887692097.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_off0000c703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC703 5400 bytes
SHA-256: 092496936c5152ce1fc12f0daf2e58b185869a41cb512e0b055fb6b568192a5c
font_01_sfnt_off0000d961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD961 10928 bytes
SHA-256: 8153f0a6f759015a94791e6190eeebd32a556cab64a4106b80393a7f6c8b4f2e

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