Malicious PDF — malware analysis report

Static analysis result for SHA-256 41b8b539ba2362f7…

MALICIOUS

PDF

75.6 KB Created: 2021-01-03 12:24:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 29dce5051211363f07f133f58eef890c SHA-1: b60af5df58e6e6b820a5a1d9dbf1b362b8f1878d SHA-256: 41b8b539ba2362f7bd84db55d63b6230bdad8e604ccf2339564c7aa77f067d62
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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
  • 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://trafftec.ru/123?utm_term=laclede+co+mo+recorder+of+deeds PDF link annotation
    • https://cdn.sqhk.co/gepeduvo/cT3ibFF/hockey_shooting_tips_for_beginners.pdfIn PDF document text
    • https://daxuregivav.weebly.com/uploads/1/3/4/4/134431970/95008a4c991049d.pdfIn PDF document text
    • https://zinaxavum.weebly.com/uploads/1/3/4/3/134354277/7a89d8c467e7a4b.pdfIn PDF document text
    • https://cdn.sqhk.co/pimidima/6wiahja/rilafekigu.pdfIn PDF document text
    • https://sumulepali.weebly.com/uploads/1/3/4/8/134882140/tenuwonirizumuwetiz.pdfIn PDF document text
    • https://pujapuvefebawu.weebly.com/uploads/1/3/4/5/134581836/1052643.pdfIn PDF document text
    • https://babotiditufo.weebly.com/uploads/1/3/4/6/134694550/retarekevada.pdfIn PDF document text
    • https://xidozuju.weebly.com/uploads/1/3/4/5/134597445/6103504.pdfIn PDF document text
    • https://cdn.sqhk.co/palazawu/jiojiib/24586773544.pdfIn PDF document text
    • https://tiluzapibijodok.weebly.com/uploads/1/3/4/2/134265907/e22030ab7b5123.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/189bdba4-c511-4216-a4df-1bffa613128c/30733008856.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aad475d1-f26b-4871-acf9-19933a5ceaa7/69760891781.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_off0000e8d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D8 5108 bytes
SHA-256: e01fb23c0d02a149ba1122478497486ada9d0b5d059de65924bed8787a657352
font_01_sfnt_off0000fa25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA25 11716 bytes
SHA-256: 9ede5389e03c104eb36d130cf5e4d75b150779d5e4c5c00b528deef1baa3668c

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