Malicious PDF — malware analysis report

Static analysis result for SHA-256 d40034a7b5cd3b4f…

MALICIOUS

PDF

73.3 KB Created: 2021-04-03 15:45:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: afbe73f10b7eb47f6f6df0421d9d58cf SHA-1: 235c3a669d7557af3c483968eed60b68b0e26421 SHA-256: d40034a7b5cd3b4fec6559c75a135dda9990588c96b33c1a9cfb427657d2566d
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://mezovuduw.ru/strik?utm_term=toro+20016+transmission+repair PDF link annotation
    • https://cdn.sqhk.co/lazimafuxuxi/hjgeZgg/unlimited_car_driving_simulator_mod_apk_android_1.pdfIn PDF document text
    • http://fsbsiod.com/1000_indian_history_gk_question_and_answer_in_hindidrj0n.pdfIn PDF document text
    • https://dukopovofozevi.weebly.com/uploads/1/3/5/2/135295758/4202613.pdfIn PDF document text
    • https://jugotazotezolut.weebly.com/uploads/1/3/5/9/135973864/95241999e09f0.pdfIn PDF document text
    • http://kikotukujumosif.iblogger.org/how_do_you_fix_a_washing_machine_that_will_not_spin.pdfIn PDF document text
    • https://cdn.sqhk.co/doporaba/xigibji/meboxumigufiwepavuxu.pdfIn PDF document text
    • https://cdn.sqhk.co/bimepefav/gg2uiaK/full_pipe_puzzle_adventure_game.pdfIn PDF document text
    • https://mobinefoju.weebly.com/uploads/1/3/1/3/131398425/2119885.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495392/normal_60147d3508f51.pdfIn PDF document text
    • http://rat-red.space/korg_kross_sustain_pedal_not_working2phfw.pdfIn PDF document text
    • http://pedrons.space/edexcel_a_level_biology_paper_3_2019kbtmx.pdfIn PDF document text
    • https://cdn.sqhk.co/tajugajobib/fwfjhtk/25403881957.pdfIn PDF document text
    • https://cdn.sqhk.co/kopilixa/iAgdExW/prison_escape_survival_island_mod_apk.pdfIn PDF document text
    • http://italiahot.fun/jikivukeq8bn6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454668/normal_5fc813b2738f1.pdfIn PDF document text
    • http://koolmaxt.online/song_lyrics_nails_done_hair_done_everything_diddset6.pdfIn PDF document text
    • https://fukidupedogof.weebly.com/uploads/1/3/2/8/132814182/8db00ce5a76e7.pdfIn PDF document text
    • http://fusavexupisedi.iblogger.org/kulidisozimipivoragemu.pdfIn PDF document text
    • https://kaxaratit.weebly.com/uploads/1/3/5/3/135383379/buzadivene.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bopebewi.epizy.com/meri_pyari_behaniya_song.pdfIn PDF document text
    • http://misamoxatupepos.rf.gd/bexinekowulaxojegajapadoz.pdfIn PDF document text
    • http://nofazixufewow.rf.gd/gojijegibabew.pdfIn PDF document text
    • http://lebasadalo.epizy.com/instagram_for_mac_os.pdfIn PDF document text
    • http://bejopobu.epizy.com/31236033273.pdfIn PDF document text
    • http://kawalagijefoj.rf.gd/47204763410.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_off0000e2db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DB 5360 bytes
SHA-256: 87feffa9b53af651b3a1f96438e32549c7437623fb20c5c33a69660ef14bc858
font_01_sfnt_off0000f4fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FC 10128 bytes
SHA-256: 5e2781a8af0cc20b3e4870af45355932ae2864f03257137cbc01b5109c7ebc4a

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