Malicious PDF — malware analysis report

Static analysis result for SHA-256 a133ca0748f1e354…

MALICIOUS

PDF

82.9 KB Created: 2021-05-08 06:35:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b483ef5809eb23b039746a7ce25a36d SHA-1: e153cea760b7185089ac14388426199720421ca0 SHA-256: a133ca0748f1e35401f45472cfc1d0a795540874d71f499cbfe1d858a4803f59
166 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and heuristics indicate it is a link farm on disposable hosting. The document body, though heavily obfuscated, contains text fragments that, combined with the heuristics, strongly suggest an advance-fee scam lure related to lottery winnings or parcel delivery. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://midufefew.ru/strik?utm_term=what+formula+does+wic+cover+in+california+2020
    • http://lyudi23.ru/analysis_of_a_long_walk_to_wateryexsk.pdf
    • https://cdn.sqhk.co/sevigexew/hdihohh/46788546208.pdf
    • https://vesedosaripiwuj.weebly.com/uploads/1/3/1/6/131636692/6865002.pdf
    • http://meetchat.space/veiled_sentiments_chapter_7_summaryzm6ic.pdf
    • http://lnstagram-badge-verification.com/netherlands_postal_address_formatzhtx0.pdf
    • http://hocostyle.ru/ensayo_el_monje_que_vendio_su_ferrari_introduccion1q3g0.pdf
    • https://suzefajadovu.weebly.com/uploads/1/3/4/5/134592553/d4ac7dcd79ceb1.pdf
    • http://form-lnstagramverificationbadge.com/pigarubuvr15mh.pdf
    • https://cdn.sqhk.co/xemuxebu/HieWuia/14350465472.pdf
    • http://fexevewuli.mypressonline.com/87777422.pdf
    • https://cdn.sqhk.co/fazologim/zigFAij/34908915460.pdf
    • https://liwotagavujid.weebly.com/uploads/1/3/5/9/135961529/nijesesisedokis.pdf
    • https://cdn.sqhk.co/rebiguta/yMhfja6/savage_love_bts_piano_tiles_3.pdf
    • https://cdn.sqhk.co/busoleva/ibSI6jb/38621557968.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/gorajikunobixi/fusijasupexivat.pdf
    • http://maxuluxusit.atwebpages.com/mubukak.pdf
    • https://s3.amazonaws.com/kijelopazekune/nifodezi.pdf
    • https://s3.amazonaws.com/tasufagijaremo/fenadabezowovi.pdf
    • http://pulutugorivexek.atwebpages.com/carol_of_the_bells_guitar.pdf
    • https://s3.amazonaws.com/senodiw/eeboo_jane_austen_book_club_puzzle_australia.pdf
    • http://vekisofekibote.myartsonline.com/romeo_juliet_quotes_baz_luhrmann.pdf
    • https://s3.amazonaws.com/dufekifaral/xibevegokinedomafuw.pdf
    • http://xadilopavut.myartsonline.com/47118245048.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f546.bin
5fe6e53ac3a9b6e2b13bc490d878c36b18429ab58629a84e13e06464d21217fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF546 5584 bytes
font_01_sfnt_off00010838.bin
86c795067e0e0276ebab407421548dc86c490f26604f015d6ffbb58023633e97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10838 11524 bytes
font_02_sfnt_off00012f70.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F70 4324 bytes

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