Malicious PDF — malware analysis report

Static analysis result for SHA-256 757d526f7e276cd0…

MALICIOUS

PDF

84.1 KB Created: 2021-03-14 11:03:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: c4afe8147b88259368dfbe7af77f1cf9 SHA-1: eb930401664f1968bf44b5d8b7a232e04e4aa7ac SHA-256: 757d526f7e276cd02abdd3c7471119418bb4ffbb80ef035b3fefc3e1d6c7f5eb
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URIs pointing to disposable domains and link farms, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the overall structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://midufefew.ru/strik?utm_term=how+to+use+samsung+dishwasher+dw80r5060us PDF link annotation
    • https://cdn.sqhk.co/mugukawi/hxmjdbn/iir_high_pass_filter_python.pdfIn PDF document text
    • https://cdn.sqhk.co/rebabafa/VJiahaA/81178672431.pdfIn PDF document text
    • http://inglassrus.ru/xedefekoxosepozurowinut7wxxt.pdfIn PDF document text
    • https://cdn.sqhk.co/xexogataza/hihhhh6/gameboy_advance_games_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/nupepewomaxu/cShfBij/dino_hunter_deadly_shores_hack_version.pdfIn PDF document text
    • https://cdn.sqhk.co/vagekoxes/VpW4AoJ/plants_vs_zombies_movies_full.pdfIn PDF document text
    • http://abistrans.ru/gezolalepuvunw34bv.pdfIn PDF document text
    • http://cyberlife.store/sondheim_losing_my_mind1stfn.pdfIn PDF document text
    • http://counterman.ru/jadakavakegibavebapididogy0t7q.pdfIn PDF document text
    • http://bisolivagamego.22web.org/euphoria_bts_video_song.pdfIn PDF document text
    • https://cdn.sqhk.co/bafesugoguwi/Q8ciqhj/kusugepofafeveriwu.pdfIn PDF document text
    • https://cdn.sqhk.co/xaripisi/1icrmhf/highway_racer_vs_police_cars_mod_apk.pdfIn PDF document text
    • http://dozixolabizije.iblogger.org/57104709835.pdfIn PDF document text
    • https://cdn.sqhk.co/tamikoveken/pjjhbhe/scratch_full_tutorial.pdfIn PDF document text
    • http://smeh-mif.space/172268638553zezp.pdfIn PDF document text
    • https://cdn.sqhk.co/sazipuvaxiv/wKigjhW/tozuzupag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/94876126-7095-4e74-abdb-ed9632bacd81/to_kill_a_mockingbird_chapter_9-11_worksheet_answers.pdfIn PDF document text
    • http://banudozege.epizy.com/como_transformar_fahrenheit_a_rankine.pdfIn PDF document text
    • http://kivevufawonin.rf.gd/63634912392.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4644cd39-ad48-47dd-970a-29b82bb440ab/what_are_standard_enthalpy_change_of_formation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c75919c-35e2-41aa-88b8-a567627cd7ff/44534333047.pdfIn PDF document text
    • http://wavubodalut.epizy.com/how_to_measure_your_dog_for_a_barbour_coat.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA93 5756 bytes
SHA-256: 8233df3e41a32cd017d6521fde56169538cbb8f34992172c10739d194f6994f7
font_01_sfnt_off00010e07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E07 11324 bytes
SHA-256: 745d0aa7a6196b21c952d3d14b2d98071a0efe4b5b1650ee2c5364b56cfde1fe
font_02_sfnt_off00013481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13481 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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