Malicious PDF — malware analysis report

Static analysis result for SHA-256 0476448a116ba323…

MALICIOUS

PDF

73.7 KB Created: 2021-02-28 15:50:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0f391fe246ebffc74a961bbc0f9a9656 SHA-1: c3d5f09d0149038d306e14bc02de0ba12958a6c1 SHA-256: 0476448a116ba32360249090e144b9f3ef5c6f59ddfab8c0c4f61a5cf5f393cd
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content, likely as part of a spearphishing campaign.

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://jumiwimov.ru/award?keyword=naz%25C4%25B1m+hikmetin+%25C5%259Fiiri PDF link annotation
    • https://liruviwogaralo.weebly.com/uploads/1/3/0/7/130776788/9665116.pdfIn PDF document text
    • http://bowanizi.22web.org/39413852344.pdfIn PDF document text
    • http://tokexal.medianewsonline.com/90537757103.pdfIn PDF document text
    • https://cdn.sqhk.co/latosagax/Kkgjfhj/remamisanerureduka.pdfIn PDF document text
    • http://mamajan.space/fuwirofofaxelogididofhbmy.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/jhjkA7N/toy_pop_cubes_blast_bunny_rescue_california.pdfIn PDF document text
    • http://wivuperafuzo.mypressonline.com/are_speed_queen_washing_machines_available_in_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/fixiwuwukufi/asii3hg/flight_pilot_simulator_3d_hacked_apk_download.pdfIn PDF document text
    • http://lakujalinifibo.mypressonline.com/kabikarudogopepifobubaw.pdfIn PDF document text
    • http://jibinomazovujug.22web.org/brazilian_carnival_music_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/2296397186.pdfIn PDF document text
    • http://jelenexej.rf.gd/meturozexe.pdfIn PDF document text
    • http://fogomagof.epizy.com/78316786079.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/pdf_biochemistry_for_medical_students.pdfIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/bamereretivobakimepud.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/36632789076.pdfIn PDF document text
    • http://situwosase.myartsonline.com/dogidumuzu.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_off0000e19a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE19A 5080 bytes
SHA-256: 41bca9394270e8e1af6afb3f26259c0785a2c30f38f4866c64ab895b6125433f
font_01_sfnt_off0000f2bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BF 11920 bytes
SHA-256: 104222d10991bfff8c685d3e121463bdd593de26d52cf3161c74e3484de1114a

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