Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ad9e9869c8b54a4…

MALICIOUS

PDF

77.8 KB Created: 2021-03-08 18:31:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: dd4a213ccfb18ba9506032262f59b9e8 SHA-1: 2aecac044092069a77b23808dfb110eb32ba36f8 SHA-256: 0ad9e9869c8b54a44cbff3b976299980308248d72dfe7c5ef8ca79630ae8037f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to 'maypoin.ru/award' and referencing 'kohler bathroom fittings catalogue pdf'. Heuristics indicate this PDF is a link farm on disposable hosting, and ML classifiers and ClamAV strongly flag it as malicious phishing content. The presence of embedded URLs suggests an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/award?keyword=kohler+bathroom+fittings+catalogue+pdf PDF link annotation
    • http://dalosizofovabes.medianewsonline.com/how_to_install_operating_system_on_hp_pavilion.pdfIn PDF document text
    • https://cdn.sqhk.co/nixafusoda/iEQ3dha/best_jet_fighter_games_ios.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380379/normal_5fcb911bd5b47.pdfIn PDF document text
    • https://cdn.sqhk.co/detateseb/iicZBJe/balls_master_new_levels.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414515/normal_5ffb6792cb717.pdfIn PDF document text
    • https://cdn.sqhk.co/musutalivun/ghdiagf/tewuzofozuvunekinubewifi.pdfIn PDF document text
    • https://cdn.sqhk.co/gitaligido/jfKU0ig/xemejofubuvadoveworuta.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427105/normal_5fcd7e4ea1cc5.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
    • http://desovizipelo.onlinewebshop.net/awareness_on_social_media.pdfIn PDF document text
    • http://fejaxiwezi.epizy.com/36092766289.pdfIn PDF document text
    • http://givetupazowo.onlinewebshop.net/21399691628.pdfIn PDF document text
    • https://033a7475-7ccb-45c1-8f1e-38fd320d48d0.filesusr.com/ugd/03a576_a24ddd7ad0db461e9e19bcd74e421bc8.pdf?index=trueIn PDF document text
    • http://zutugidod.onlinewebshop.net/25560460145.pdfIn PDF document text
    • http://zonavopom.rf.gd/42598408685.pdfIn PDF document text
    • https://0cfe495c-9a5f-46a1-a5f3-fb21b6211bac.filesusr.com/ugd/7aabb2_11db411822034872940612636aa7fa42.pdf?index=trueIn PDF document text
    • http://rewuwuja.onlinewebshop.net/20790429721.pdfIn PDF document text
    • http://xeriseworonopez.rf.gd/monster_2003_movie_online.pdfIn PDF document text
    • http://tiwosutodegadax.onlinewebshop.net/aeschylus_agamemnon_sparknotes.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_off0000e5ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AD 5560 bytes
SHA-256: dd120c921d3a4761db12f37120d48574d18ffde20a28b7cfd9999c115442244d
font_01_sfnt_off0000f870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF870 10380 bytes
SHA-256: 6b84000a24355a25ffb5d55fbe454e5fb12ee07935856d3c4cbe0500391158e2
font_02_sfnt_off00011bef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BEF 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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