Malicious PDF — malware analysis report

Static analysis result for SHA-256 9836fb6854eb3597…

MALICIOUS

PDF

69.4 KB Created: 2021-01-04 21:29:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 509c9fd484dda94006302ee35f2661bc SHA-1: 3ec535ad5e099d157c1f342ac0b91116f28a752e SHA-256: 9836fb6854eb35979e0e39455447a37de97f6804c3debe75c98266781d972e30
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. The presence of embedded URLs and the overall structure strongly suggest this document is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://trafffe.ru/aws?utm_term=starter+checklist+form+printable PDF link annotation
    • https://boxolajabamofi.weebly.com/uploads/1/3/4/3/134356625/8334548.pdfIn PDF document text
    • https://roninuvanajeg.weebly.com/uploads/1/3/1/3/131379749/7745478.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404490/normal_5fa8bafaf33e1.pdfIn PDF document text
    • https://cdn.sqhk.co/xefijumu/Ahe1Sry/soccer_manager_games_pc_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367950/normal_5f8b5bd359ce7.pdfIn PDF document text
    • https://mamumudud.weebly.com/uploads/1/3/0/8/130814078/belozujirab_zasazibafibir_gugagak_lubimav.pdfIn PDF document text
    • https://mukeluxera.weebly.com/uploads/1/3/4/5/134528716/kasefawuwewevukew.pdfIn PDF document text
    • https://cdn.sqhk.co/mujexoxa/jNgdhdC/lowes_refrigerators_lg.pdfIn PDF document text
    • https://simebofes.weebly.com/uploads/1/3/1/4/131438459/zakirakolilor_rujuramikumo_mobufida.pdfIn PDF document text
    • https://cdn.sqhk.co/sugifila/u6icjhN/98079853836.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/pazovugal/69618015698.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/77358711230.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31f21420-ea02-4991-919d-c96451fad1c3/kedelatezas.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 8

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_off0000d107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD107 5560 bytes
SHA-256: 8b2282e074ec029ffad6a3a2f4ee9370db5f456556135d573f7609808d982fb7
font_01_sfnt_off0000e3c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C0 10988 bytes
SHA-256: fc44acdf61a179f57fb49ddf428e93deb76c79004e5019245d1b9311baf4c3ed

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