Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec3e237232661653…

MALICIOUS

PDF

67.6 KB Created: 2021-01-06 07:07:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 030853d093360159db6f8becb5399f51 SHA-1: a7230b1fd08b28ef04cc2ca8c06a709277163b08 SHA-256: ec3e237232661653546fb015bb9ab6e40f464c5f6f4290444a1c33054816dc02
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm on disposable hosting, with a primary external URI pointing to a suspicious domain. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were extracted, the embedded URI and link farm characteristics point towards a social engineering attack to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7688

Heuristics 4

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffnew.ru/aws?utm_term=attendance+register+format+for+school PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373004/normal_5faf13c613714.pdfIn PDF document text
    • https://xubawiki.weebly.com/uploads/1/3/1/1/131163512/levatujusab_vatodi.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxozowaki/r6igZlz/bodekaregolusorakudepalit.pdfIn PDF document text
    • https://jebapawobukil.weebly.com/uploads/1/3/4/5/134521284/1008d5ac0a.pdfIn PDF document text
    • https://murufafutebe.weebly.com/uploads/1/3/4/4/134473477/mumuzajosekotu.pdfIn PDF document text
    • https://damijuvik.weebly.com/uploads/1/3/1/3/131381376/zudamivajet-xemezusokufobin.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/bufexa/11653440238.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/057c5aa0-5946-4e95-b4e4-42efa39fd39f/nafelepisunobobox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/247c198c-1a38-4d2f-a4e0-8c5a6954fcdc/82954232700.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/pomonox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75d692ab-a6b8-4c51-9cce-0252314c2527/apocalipsis_de_pedro.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE017 5424 bytes
SHA-256: 4f8489ddcc1b9a91debb14d479f021c3f5666154059e76e47316454c7302d63f

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