Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e1790039c66513e…

MALICIOUS

PDF

93.3 KB Created: 2021-02-05 03:55:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 75ca83b66b5028430af55985e895afdb SHA-1: fdd373e8388374fc467885c82c22a90d727bab4c SHA-256: 6e1790039c66513e225ce0dbc1b986655c5ba687be3ed6a881f6864d71f5717e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a spearphishing attachment designed to lead users to malicious content.

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/123?utm_term=oh+she+glows+cookbook+pdf+download PDF link annotation
    • http://jadebey-x.com/sniper_assassin_5_walkthroughjiczb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446772/normal_6012fef620483.pdfIn PDF document text
    • http://chaptejvxz.fun/teachers_college_columbia_academic_calendarl0pa3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475874/normal_5fc6bbdbe8b44.pdfIn PDF document text
    • http://submonster.xyz/42109392931cmj95.pdfIn PDF document text
    • http://kalavar.xyz/mount_and_blade_bellum_imperii7s8h6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422382/normal_600b73187e7bd.pdfIn PDF document text
    • http://sun-italy.space/starz_encore_schedule_eastpw063.pdfIn PDF document text
    • http://choosenews.space/34141765041ejlp4.pdfIn PDF document text
    • http://passive-income.ru/los_temerarios_discografia_320_kbpsv1nhi.pdfIn PDF document text
    • http://livecopyrightverification.com/87848699065smrad.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/gomakobez/synonym_for_acknowledge_information.pdfIn PDF document text
    • http://josewovegufi.rf.gd/dezolodofo.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/15506103446.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/nizowefosadufizuxezabadu.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/oxford_discover_5_workbook_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/96957835351.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_off00012d05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D05 5644 bytes
SHA-256: 5c342e4df94b441ac3197f78a9b24c6c4a4c1b176af0e79a89c5fd9eb9e3c764
font_01_sfnt_off00014049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14049 11576 bytes
SHA-256: 5c8de401f38bf7b570e1b707b5a3e33594b718121146a5814d450940d99371ab

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