Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c2e93c298ec6e96…

MALICIOUS

PDF

75.3 KB Created: 2021-03-22 07:14:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 423e3916c3a27106c34a227ebff17ed1 SHA-1: ce9310411127ad1b27ddee007814bee835558d9c SHA-256: 4c2e93c298ec6e9671a8a6aed3e5ccb3a549587022cf4f53e6cfaf960c50df72
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/strik?utm_term=can+galaxy+tab+a+be+upgraded PDF link annotation
    • https://nukusuruv.weebly.com/uploads/1/3/1/8/131857442/sizazowita.pdfIn PDF document text
    • https://xixozikitep.weebly.com/uploads/1/3/4/0/134097223/zejipefuxe.pdfIn PDF document text
    • http://maturibcgj.space/general_knowledge_2018_gujarati5gfum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477626/normal_5ffe627969e7b.pdfIn PDF document text
    • http://tophomework.space/volapobifogesimew3chl2.pdfIn PDF document text
    • https://cdn.sqhk.co/kadunila/fyk3ybW/bebomojelaxogewowa.pdfIn PDF document text
    • https://muxiduxipa.weebly.com/uploads/1/3/5/3/135319221/5974772.pdfIn PDF document text
    • https://cdn.sqhk.co/segevenujuka/6gdXojd/latest_praise_and_worship_songs_2020_mp3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462350/normal_60421c1c4b255.pdfIn PDF document text
    • https://salofapaj.weebly.com/uploads/1/3/4/3/134314320/794d0250c957.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421624/normal_5ff19d24e95d4.pdfIn PDF document text
    • https://jakugogafezokev.weebly.com/uploads/1/3/1/4/131437362/87ecbb8.pdfIn PDF document text
    • http://kungfumalibu.com/electrical_symbols_for_drawings79hiy.pdfIn PDF document text
    • http://summ-green.fun/dujokegikixerubokazax3yur7.pdfIn PDF document text
    • http://kukushpa.fun/how_to_clean_nutone_range_hood_fanep7th.pdfIn PDF document text
    • https://cdn.sqhk.co/kolusugego/5ihgghi/85818483264.pdfIn PDF document text
    • https://zorimogitew.weebly.com/uploads/1/3/4/4/134487520/8591088.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/dewazewokib/fishing_report_washington_canyon.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/62524054940.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/mission_impossible_theme_sheet_music_alto_sax.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/national_clogging_cue_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/almacenamiento_externo_para_android.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_off0000eaf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF8 5164 bytes
SHA-256: 69e2ab5b9abad66935360355154db8a57b8f1ec1029e7031eef728a10c1fa6f6
font_01_sfnt_off0000fc9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9B 10328 bytes
SHA-256: 3d285fff9ee92c2b7d8241737186f9b22f19cbaad4c12cf723a237df834c6662

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