Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6afde0f2757d349…

MALICIOUS

PDF

71.7 KB Created: 2021-02-17 02:14:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 96717a1d1e7b9960768cc151ffa0be96 SHA-1: 8b3a32b2aa90bb7f80b96867253a28326ff40697 SHA-256: c6afde0f2757d3495ff8a65a9b8e6ecca41b8aaf8bad630a95352921f24d471b
126 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL suggesting a lure for a 'tire service contract free pdf editor'. The document's structure and embedded links indicate it functions as a link farm designed to redirect users to potentially malicious sites, likely for phishing or malware distribution.

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://jacksth.ru/wix?keyword=tire+service+contract+free+pdf+editor PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388293/normal_5fe8f52eaa800.pdfIn PDF document text
    • https://cdn.sqhk.co/fudikuzi/6wL0d0H/pisoxenekijejemedu.pdfIn PDF document text
    • https://bevowodawalejap.weebly.com/uploads/1/3/4/3/134363876/90c1050331f47fe.pdfIn PDF document text
    • https://safubijob.weebly.com/uploads/1/3/2/6/132682970/3783892.pdfIn PDF document text
    • https://nelajelax.weebly.com/uploads/1/3/2/7/132712676/zusazi_zenepekinad_kagume.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498983/normal_5fcd1f546b8b0.pdfIn PDF document text
    • https://cdn.sqhk.co/nenakowi/agjGhfB/lesson_plan_template_word_processor.pdfIn PDF document text
    • https://mevukufidax.weebly.com/uploads/1/3/1/3/131379039/3610241.pdfIn PDF document text
    • https://dirivabekere.weebly.com/uploads/1/3/3/9/133999762/403ed3c845d7a3e.pdfIn PDF document text
    • https://marotebage.weebly.com/uploads/1/3/4/7/134712984/1861219.pdfIn PDF document text
    • https://cdn.sqhk.co/gixezovof/ggJaQje/cruise_from_galveston_to_key_west_and_bahamas.pdfIn PDF document text
    • https://zorivaleguzovul.weebly.com/uploads/1/3/4/5/134596353/zuwexivomimafa-vozozojibe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452377/normal_5fea2693189e6.pdfIn PDF document text
    • https://kaguleturega.weebly.com/uploads/1/3/4/9/134904612/cbed12f7abad.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
    • http://fufebelanamug.rf.gd/minecraft_pocket_edition_pc_completo_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/descriptive_survey_research.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/biochemistry_chapter_test_a_answers.pdfIn PDF document text
    • http://boxogegifenefi.epizy.com/ls_dyna_jobs.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_off0000cf7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF7A 4916 bytes
SHA-256: 2f40979cf2ec8ce1ee6d9a9f46cad37f858355146bf1f611887a451b775844bd
font_01_sfnt_off0000e039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE039 10368 bytes
SHA-256: 40494ea1514c2b27a92a521d8d012bd598b5fa637b266e9008239e63dabcae40
font_02_sfnt_off000103c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C2 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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