Malicious PDF — malware analysis report

Static analysis result for SHA-256 04990cef15f0afbf…

MALICIOUS

PDF

66.3 KB Created: 2020-11-18 23:08:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 2d7c27a4b0f87ee145f50ce133701201 SHA-1: 970b04ae11ce1d30da43d0d7321a2c022d34f178 SHA-256: 04990cef15f0afbf02dedc5f4153e0c537ce057af1e1a5fbb637671f9f6b2ac3
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting it is part of a link farm designed to redirect users to malicious websites. The primary URL, 'https://trafficel.ru/strik?utm_term=gta+t%25C3%25BCrk+100+save+indir', appears to be a lure for a game-related download, which is a common social engineering tactic.

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://trafficel.ru/strik?utm_term=gta+t%25C3%25BCrk+100+save+indir PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426688/normal_5fb374949b691.pdfIn PDF document text
    • https://fotejisatowonu.weebly.com/uploads/1/3/2/3/132302873/6d475.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491671/normal_5faf60c027685.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402712/normal_5fa2de3753403.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376600/normal_5f908cee1c920.pdfIn PDF document text
    • https://rojigoziziza.weebly.com/uploads/1/3/4/4/134434225/b432782.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464080/normal_5fa4676897426.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415944/normal_5f9a4a174dc03.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/lulelepese/gisipiragozikasalaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/891d9046-d5b1-4e70-83c1-e1b773ec8df3/sufajuvifo.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/hill_climb_2_hack_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/78223143841.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_off0000c170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC170 5256 bytes
SHA-256: a9ab8f6872fa9e6414d6f3c8377cb5ea9b8e0b588d93b21d945f5a2ba7999e00
font_01_sfnt_off0000d339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD339 12828 bytes
SHA-256: bb083a7d6eb504489a46fea6405fe27b73b52fe4681e5b747ae3e7575ee7a51c

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