Malicious PDF — malware analysis report

Static analysis result for SHA-256 3755c895e06ff21b…

MALICIOUS

PDF

71.2 KB Created: 2021-01-03 03:37:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2f0f30af739534f3f27f70e7e5ffed5a SHA-1: eb23d5321674454c49c049802c2e69a011f13757 SHA-256: 3755c895e06ff21ba0b7ae5090632007674788d1e4440e22cf465bbc27a9e104
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external links, including one to 'traffset.ru', suggests an attempt to redirect users to potentially harmful content or phishing sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a phishing or malicious content delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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/aws?utm_term=the+breed+movie++mp4 PDF link annotation
    • https://samibogamo.weebly.com/uploads/1/3/4/8/134883552/siwutizoma.pdfIn PDF document text
    • https://bikonate.weebly.com/uploads/1/3/4/7/134715396/3069328.pdfIn PDF document text
    • https://nesipemuwazona.weebly.com/uploads/1/3/4/8/134881126/9ea20c8909b13fd.pdfIn PDF document text
    • https://dumopodowejuna.weebly.com/uploads/1/3/4/5/134591879/455938.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389571/normal_5f9886e799cdf.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/aadd3026-4751-4eb0-b486-344ba6f937cb/66170928515.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/63973193012.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3db4c19e-1b6e-41d1-9294-4ed1ff44af7c/dhol_baje_re_timli_song.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/similar_triangles_word_problem_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/adding_subtracting_and_multiplying_polynomials_practice.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/rowatu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c486013b-d15d-44d6-ae15-fb9013355ec8/87910115873.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/mojixiwawed.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_off0000d987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD987 5016 bytes
SHA-256: 9346a756c1ae8ef6b47cc67eaef23c6ae414817754a14943115bf94a44297756
font_01_sfnt_off0000ea6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6A 11016 bytes
SHA-256: 7fb07901d34bd7dfeaf8cbb5c55c8d60f84514bb7525183438978b692cf361b0

Open this report in the interactive analyzer, or submit your own file for analysis.