Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1a33bfc9e805687…

MALICIOUS

PDF

70.1 KB Created: 2021-02-08 10:39:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: a3ae4b561c5dc6b587374097c6a5bcf3 SHA-1: be45a9df384e1ffbef011d0e169d3ff134098880 SHA-256: a1a33bfc9e80568772c87b1cfc13f4a17f15744342eef7e075505fc13f9aa55c
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/wb?keyword=english%20grammar%20learning%20videos%20free PDF link annotation
    • https://muwivagejexe.weebly.com/uploads/1/3/1/3/131379070/nefubigoduku_wisolepuge_wotava.pdfIn PDF document text
    • https://cdn.sqhk.co/fifapupifig/hjjgjjM/48824103866.pdfIn PDF document text
    • http://cookwellbakewell.com/43122238276etu66.pdfIn PDF document text
    • http://auto-agents.space/exercice_algorithme_avec_solution_pd4759s.pdfIn PDF document text
    • http://palejep.22web.org/termidor_sc_msds_sheet.pdfIn PDF document text
    • http://coolmag.biz/59287745370vea82.pdfIn PDF document text
    • https://cdn.sqhk.co/fowijuseziju/fgggdjd/island_in_the_sun_lyrics.pdfIn PDF document text
    • http://6gusevshop.website/jurassic_world_alive_1._16qpr5h.pdfIn PDF document text
    • https://piworanup.weebly.com/uploads/1/3/2/6/132681558/dexosepasupome.pdfIn PDF document text
    • https://narufana.weebly.com/uploads/1/3/4/6/134653256/d86010a1c0867.pdfIn PDF document text
    • https://fiwofufoneronup.weebly.com/uploads/1/3/1/0/131071066/6760626.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tepokubomime.rf.gd/64144896725.pdfIn PDF document text
    • http://feloxokarapuj.rf.gd/totemuni.pdfIn PDF document text
    • http://popaxaxi.epizy.com/42140431851.pdfIn PDF document text
    • http://zepenolewiri.epizy.com/25937224969.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_off0000d73c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD73C 5340 bytes
SHA-256: 26209a76552f198adf33f50f5f7782831597f4ffb2a6dc84a0b8363806433b58
font_01_sfnt_off0000e945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE945 10012 bytes
SHA-256: a13960b24bd4b23d24eb5c9e7bb51647668397a2b748a05abb58c92a1d7a6e57