Malicious PDF — malware analysis report

Static analysis result for SHA-256 1610e3b6e29eb0c3…

MALICIOUS

PDF

67.8 KB Created: 2020-12-18 23:28:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 844bf0d3741e2957cf5e63f0a80a0259 SHA-1: 47049941ee8fdc26a912f35fba473d6e18a5701f SHA-256: 1610e3b6e29eb0c3d72a9c0ea660343d3b11e8f6b601a03df214bd3f44eb5329
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains multiple embedded URLs, with one pointing to 'trafftec.ru', suggesting an attempt to redirect users to potentially harmful sites. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the phishing or link-farming attack pattern.

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=longfellow+middle+school+wauwatosa PDF link annotation
    • https://guxofoxevi.weebly.com/uploads/1/3/4/7/134737998/mefogaxamumo.pdfIn PDF document text
    • https://karojigulad.weebly.com/uploads/1/3/4/6/134623473/gejexoxelato.pdfIn PDF document text
    • https://gokopawe.weebly.com/uploads/1/3/4/4/134493337/4589730.pdfIn PDF document text
    • https://jenetekeze.weebly.com/uploads/1/3/4/7/134772573/gabofipoze.pdfIn PDF document text
    • https://lonopowixeza.weebly.com/uploads/1/3/4/6/134620564/8b59d7d31068.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/vipinib/scotland_s_longest_river_crossword_answer.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc104e3405d5340f32a388f/t/5fcba1fd9cf56e0e8b156246/1607180800368/7904488947.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/betting_apps_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba023b70-9be1-4e05-9182-437cf06c8add/vidizupanotunitomuvez.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4db98b8467722f1ed36c9/t/5fc8b2b713de6e798160c295/1606988472241/magazidesafum.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce663790e5b06becb785e9/t/5fd75b86313c42342bab1762/1607949191028/premier_league_2018_19_clean_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f78ab8ad-6b17-4127-b814-8c938a1b7d45/ps4_remote_play_android_apk_samsung.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_off0000cd92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD92 5372 bytes
SHA-256: c3e057146fd4dd19acbf488e3e7a2d39016ed9009c5341afbdf4b856055a028c
font_01_sfnt_off0000dfd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD3 10088 bytes
SHA-256: 95cc928cf037f22b37e6df27a44d6e2d87805ac62105dbef1b7eaae1fc94fc34

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