Malicious PDF — malware analysis report

Static analysis result for SHA-256 e725440b1fdf28f0…

MALICIOUS

PDF

85.1 KB Created: 2021-03-17 08:56:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: bb85210106425a4cc0e49e4b73e9e16e SHA-1: d6d0a1331163ac20bfad09cb4a1a8f83d5f762bc SHA-256: e725440b1fdf28f0bcd7e173a03585dcb68dc41ad3114ee755e562ba712cc81d
66 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • 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://nipisod.ru/123?utm_term=addiction+movie+2004 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4471455/normal_5ff6ace4495bf.pdfIn PDF document text
    • http://netolenogafa.getenjoyment.net/venemibanivilafiboluwas.pdfIn PDF document text
    • http://viniveba.mywebcommunity.org/batejanedanofedewakinij.pdfIn PDF document text
    • http://beduzevitugok.mypressonline.com/famorukomigagekudazugalu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366043/normal_5fd05113d434c.pdfIn PDF document text
    • http://tufofol.medianewsonline.com/81602802627.pdfIn PDF document text
    • http://tefitagesev.mypressonline.com/anxiety_questionnaire_for_adults.pdfIn PDF document text
    • https://cdn.sqhk.co/tesadubozino/wtqnhiG/2021_mlb_schedule_astros.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465564/normal_60012add59447.pdfIn PDF document text
    • https://cdn.sqhk.co/wevujawej/5agj8jb/white_metal_platform_bed_frame_queen.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380539/normal_600853c94af3f.pdfIn PDF document text
    • https://cdn.sqhk.co/zasemewiti/yjcgiJT/vanedipitedup.pdfIn PDF document text
    • http://wegaturagifo.getenjoyment.net/98359201615.pdfIn PDF document text
    • http://kitukotobov.medianewsonline.com/taxetopevizugakevelamuxan.pdfIn PDF document text
    • https://cdn.sqhk.co/panafilaputu/DjeU4wt/buxosolapukisoduniniman.pdfIn PDF document text
    • http://sevezor.scienceontheweb.net/export_without_bleed_indesign.pdfIn PDF document text
    • http://bewujasixi.mywebcommunity.org/repeated_measures_anova_spss_output_interpretation.pdfIn PDF document text
    • http://nipokaxa.getenjoyment.net/is_sonic_soft_serve_real_ice_cream.pdfIn PDF document text
    • http://nigoguno.scienceontheweb.net/stand_by_me_lyrics_oasis_traduzione.pdfIn PDF document text
    • http://bumululoru.mywebcommunity.org/dedadisamababumaluz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386087/normal_5fda76a4673d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5fd80af4cca44.pdfIn PDF document text
    • https://cdn.sqhk.co/vefusujix/jj2hijb/carrie_underwood_first_song_on_american_idol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xobebol.onlinewebshop.net/frigidaire_fghb2866pf9a_parts.pdfIn PDF document text
    • http://kofaxafogi.myartsonline.com/mosajig.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_off00010f9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F9C 4980 bytes
SHA-256: 5593bb3b23bd6b80ef9d990adb37f6a4a81eb2d296b9d75fa2b2b6d8a2ae88f0
font_01_sfnt_off00012091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12091 11196 bytes
SHA-256: faf256af0776a1947a592c5aafef633aa7cfacc928592708839c5935c103ccc7

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