Malicious PDF — malware analysis report

Static analysis result for SHA-256 96b2979870631987…

MALICIOUS

PDF

69.0 KB Created: 2021-03-26 07:16:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44eaea9f0633a3f92eeda71b070a1848 SHA-1: 970fd979a5ffdf050fc32f379beb4ac0d0db7c8c SHA-256: 96b29798706319875cbbb8c50af9187d9f0be2a378689b46ebb600ddcbc1529e
126 Risk Score

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 disposable domains, suggesting a link farm or phishing lure. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically identifies it as a link farm on disposable hosting, reinforcing the malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/wix?keyword=leatherworking+leveling+guide+ffxiv
    • https://vosojexurixug.weebly.com/uploads/1/3/1/0/131070535/zosutuwu-tapiserititadu-kaxeg.pdf
    • https://buxiwizekekaxe.weebly.com/uploads/1/3/4/6/134662233/8713275.pdf
    • https://vesekukoluvili.weebly.com/uploads/1/3/4/7/134759730/0a51487997098e4.pdf
    • https://sovopubi.weebly.com/uploads/1/3/0/7/130775052/04c88.pdf
    • http://hugertely.xyz/how_much_do_viking_sewing_machines_costsfe7k.pdf
    • https://xedowekogo.weebly.com/uploads/1/3/4/6/134609622/pumakopezuza_nuverojirap.pdf
    • http://idealica-italy.site/mah_bed_cet_score_card_2019lmtua.pdf
    • http://nosinoski.shop/loligiritibuxoniserowspp4y.pdf
    • http://liwexun.mywebcommunity.org/ezgo_powerwise_qe_charger_problems.pdf
    • http://tonemisi.medianewsonline.com/venture_capital_and_private_equity_a_casebook_5th_edition.pdf
    • https://nimimetifav.weebly.com/uploads/1/3/2/8/132814674/ad0ece152b3c05.pdf
    • https://gufiferufa.weebly.com/uploads/1/3/2/3/132302963/6aad37.pdf
    • http://fisuruwibowin.66ghz.com/browser_source_code_android_studio.pdf
    • http://pedrons.space/lithium_fluoride_formation_equation4zw1k.pdf
    • http://wifefavowe.iblogger.org/pejolitefof.pdf
    • http://paselon.getenjoyment.net/do_chloroplasts_contain_chlorophyll.pdf
    • https://didejigoximatex.weebly.com/uploads/1/3/1/0/131070501/gofup_mikosu_lepuxovil_wezubu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://miwefonozez.epizy.com/letter_t_coloring_worksheets.pdf
    • http://gevejonitu.onlinewebshop.net/4348373073.pdf
    • http://kaxuwenewutexu.myartsonline.com/temolos.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf5e.bin
34f7c62bd48ad13ebb6c4b31c2f3d4234707e11f39a8c0e97a4126fe00103c3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF5E 5216 bytes
font_01_sfnt_off0000e139.bin
7a478dbb05836c95be28018efc5f6661c3bf03fa5f4db256beee351b0af48114		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE139 11028 bytes

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