Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a98ae1c0ddb85f6…

MALICIOUS

PDF

68.2 KB Created: 2020-12-20 20:10:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 38a039616fce1cfe19d63c762a6ac6a6 SHA-1: c1d7f3fc7152f09822390adcb00f6716cdab970c SHA-256: 7a98ae1c0ddb85f6f70b20fba23efc0bdadffaee4be2353fa4320a2d1f3861da
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many pointing to PDF files hosted on various platforms, suggesting a link farm or SEO manipulation tactic. The primary URL, 'https://trafffe.ru/strik?utm_term=persona+3+start+date', indicates a potential phishing or malicious redirection attempt. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious intent, likely to drive traffic to malicious sites or distribute further malware.

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://trafffe.ru/strik?utm_term=persona+3+start+date PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4401555/normal_5f970a12b57bb.pdfIn PDF document text
    • https://wesodopudo.weebly.com/uploads/1/3/4/2/134234684/8460372.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480756/normal_5fb3290a4b8ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446790/normal_5fa773cc33fb5.pdfIn PDF document text
    • https://wogalipa.weebly.com/uploads/1/3/4/3/134316604/kezojejoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478928/normal_5fd8449580c90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374689/normal_5f89610269bac.pdfIn PDF document text
    • https://xipezote.weebly.com/uploads/1/3/4/8/134882979/vaxodoxowur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403946/normal_5f97301d625cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404528/normal_5fb5e7865293a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379380/normal_5f8b661ba5d93.pdfIn PDF document text
    • https://bijawodit.weebly.com/uploads/1/3/4/8/134883407/kerili-tidabozudek.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/dc0d6bed-2585-4999-b471-bd1ab3b80b90/parallel_lines_and_transversals_worksheet_answers_18.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3f8ab8b-54e0-4a81-bd9f-22178b5674d1/cover_fire_apk_only.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/canaux_bell_fibe.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/wamusedeserimowalomowezez.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_off0000ced3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED3 4952 bytes
SHA-256: 1530cf950d79ed2b1fa6f32b4465056367ba82f542b041208458d3654887ce75
font_01_sfnt_off0000dfb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB4 10860 bytes
SHA-256: 9bea63e4e6153446e67d929aa40cdca311b915f168fdbc35a0417b5803f617a7

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