Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fe8a8ac873bc125…

MALICIOUS

PDF

76.0 KB Created: 2021-02-16 07:48:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 37d906b0af339843ac6ab6f95ec2b4f3 SHA-1: 221cd893efcd6cd7ac0501ea74dac15495f2e5d8 SHA-256: 9fe8a8ac873bc1250579d524cfd3034afe8ec9094a96d0f2e73879736c2ac7ad
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs pointing to potentially malicious domains, suggesting it is part of a phishing or malware distribution campaign. The presence of external URIs and link farm characteristics further supports this assessment.

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://jottigo.ru/strik?utm_term=your+application+is+not+straightforward+2020 PDF link annotation
    • http://xsale.trade/reading_and_writing_3qjkw8.pdfIn PDF document text
    • https://tiwebusimevadeb.weebly.com/uploads/1/3/5/3/135346158/dff48cce5e7f.pdfIn PDF document text
    • https://duzozerijadid.weebly.com/uploads/1/3/4/4/134493401/3999445.pdfIn PDF document text
    • http://netewe5.xyz/blablacar__androidyh68k.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422890/normal_5fec9dbcc0687.pdfIn PDF document text
    • https://cdn.sqhk.co/bipokagiti/hIifsgj/food_lion_myrtle_beach_delivery.pdfIn PDF document text
    • https://xejapekedom.weebly.com/uploads/1/3/4/8/134864907/xazot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417422/normal_5feb0d66b8da6.pdfIn PDF document text
    • http://fortuneo.best/argentine_football_association_twitterpew08.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/pgiuOg8/56503832609.pdfIn PDF document text
    • http://xteenware.online/talking_about_leisure_activities_worksheetsknsji.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/gdyK3hg/tejas.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/ecjd5oH/vertigo_after_having_covid.pdfIn PDF document text
    • https://cdn.sqhk.co/xafemepino/jcjcV6V/14606170753.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406456/normal_5fcb239ced692.pdfIn PDF document text
    • https://cdn.sqhk.co/jonimaze/ohjghgI/usa_dating_site_free_chat.pdfIn PDF document text
    • https://cdn.sqhk.co/xumelesep/4hbUfSN/troll_face_quest_video_games_level_25_walkthrough.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/leributafa/adept_english.pdfIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/kunadulagozinaf.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD6 5508 bytes
SHA-256: aeb57ddac4e67c9ed5f0b3c0182d7615be790e5e87e5fd71ca06a0703aacff89
font_01_sfnt_off0000ee92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE92 11068 bytes
SHA-256: e7dea1526789120b42bebcc735a6e8beca7c36744833c2de14de392e9d3f8eda
font_02_sfnt_off00011462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11462 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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