Malicious PDF — malware analysis report

Static analysis result for SHA-256 63f285c3fbaf6e75…

MALICIOUS

PDF

74.0 KB Created: 2020-12-24 09:13:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a5ff1060d2aa1ffcdde9cb2a480607d6 SHA-1: 9d111e2a865f5aa9fe72c65ab45522bda1462c86 SHA-256: 63f285c3fbaf6e754c7a897a052139eaaac12ad3cf4103150403511dd6b07b39
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 other PDFs, suggesting a link farm or SEO abuse tactic. One prominent external URI, 'https://trafficel.ru/strik?utm_term=story+maker+instagram+story+maker+editor', indicates a lure to a story maker tool. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafficel.ru/strik?utm_term=story+maker+instagram+story+maker+editor PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408981/normal_5f9e870316af8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413457/normal_5fbd065ee5cc0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463286/normal_5fca917179b45.pdfIn PDF document text
    • https://povemiloten.weebly.com/uploads/1/3/4/6/134608376/c22afbf2386f2b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378390/normal_5f8bd6b393d4d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454163/normal_5fe38b84b4d43.pdfIn PDF document text
    • https://xugimitedekilim.weebly.com/uploads/1/3/1/4/131482884/8534598.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500447/normal_5fd1ed276235e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469386/normal_5fa33b9aa41f0.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/3aeecffc-c9cd-4eef-9fbc-63c87f4e9c00/56414079940.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e49c5b0-15b0-4b7f-9683-98036133b203/switch_lite_coral_walmart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e0764b3-f1c0-4ddc-9222-b87c7babe37b/punjabi_sad_song_ringtone_download_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/4liker_latest_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/emirates_damaged_baggage_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/wuwuvaterulazotenopu.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C3 5384 bytes
SHA-256: 7b5313f79c1489d4f3bc406cf6cfac2bf9dde9ad014d3dd24ad10d457fcc79e8
font_01_sfnt_off0000f502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF502 11160 bytes
SHA-256: 29a570fe6157908a1798978e3a0808b428dcb6bab3a709b855190ed529d267d6

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