Malicious PDF — malware analysis report

Static analysis result for SHA-256 1db7252b24617771…

MALICIOUS

PDF

100.6 KB Created: 2021-03-29 07:13:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3842c581a387335bf8acbe797b533b4e SHA-1: d77b5006f834183a9eadc77e42aa1e919affac74 SHA-256: 1db7252b24617771532e075711408ace5637aa50b21f845d240fc5c7bdd14e5e
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to appear as legitimate software downloads. The primary URL, 'https://crophysi.ru/123?utm_term=adobe+audition+2015++with+crack', explicitly mentions cracked software, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crophysi.ru/123?utm_term=adobe+audition+2015++with+crack
    • https://cdn.sqhk.co/pixazizaze/2jlCjdl/fozarofosike.pdf
    • https://cdn.sqhk.co/regisanozoxo/MMifhar/disney_heroes_battle_mode_best_team_2020.pdf
    • https://furamakivagoj.weebly.com/uploads/1/3/0/8/130814247/96faa8f97.pdf
    • http://iglivesupportteam.com/febotixolojoxevogidabpvhhc.pdf
    • https://cdn.sqhk.co/fixefalid/ge1Pfhh/gepiwatezuzamosabolitod.pdf
    • http://wspring.space/61387773025dj9kl.pdf
    • http://levelupguild.com/kolejasizapuvd483s.pdf
    • https://zetozegazironik.weebly.com/uploads/1/3/2/6/132696155/miniza-roturamonifi.pdf
    • https://cdn.sqhk.co/mujexoxa/1FmdIbv/bubble_tea_dragon_ball_tea_house.pdf
    • http://kushtanash.ru/harry_potter_book_6_audiobook_jim_dalek0woj.pdf
    • http://auto-agents.space/titusujoku5w6qo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nefigubisi.epizy.com/acknowledgement_receipt_bir_template.pdf
    • https://s3.amazonaws.com/genukopapovixo/96058684696.pdf
    • http://fodixox.rf.gd/nukujumafobef.pdf
    • https://s3.amazonaws.com/vesubodufisi/missouri_confidential_case_filing_information_sheet_codes.pdf
    • http://guxovoxed.rf.gd/43550803853.pdf
    • https://s3.amazonaws.com/wanalovum/wafikomefeti.pdf
    • http://sutejapikomi.epizy.com/articulos_cientificos_cortos_para_nios.pdf
    • https://s3.amazonaws.com/setikizo/survival_horror_games_ps4_online.pdf
    • https://s3.amazonaws.com/gudukupir/florida_vehicle_registration_information_lookup.pdf
    • https://s3.amazonaws.com/zufaxepixiguxax/lewuromesarofim.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_off0001488d.bin
dc7c50226df4e8e96e39a825fa21984a7f2f56caf6cc31ff63afed6323d5f38d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1488D 5552 bytes
font_01_sfnt_off00015b8a.bin
17771e5d951787de9ec4d74cb7566d55807083a4428a27225efbc2de13271bc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15B8A 12100 bytes

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