Malicious PDF — malware analysis report

Static analysis result for SHA-256 d19e678077e87f6f…

MALICIOUS

PDF

73.5 KB Created: 2021-03-19 03:42:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: be29cd1ab17a195d058383bf40615484 SHA-1: 1fc7aa4e36094a8be47e21afb2d4ce84f0fddb6f SHA-256: d19e678077e87f6fcbcffec595732f187dd28908dbfcf9b6c6f803bb2c205c81
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting or link farms, suggesting a phishing or malware distribution scheme. The presence of external URIs and the overall structure indicate an attempt to redirect users to malicious sites, 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://resalured.ru/wix?keyword=necromancer+gw2+build+guide PDF link annotation
    • https://cdn.sqhk.co/ninubisidire/d6jhheU/card_crushers_multiplayer_monster_battle_tcgplayer.pdfIn PDF document text
    • https://cdn.sqhk.co/dugudumopup/jbhc3gj/centene_chief_information_security_officer.pdfIn PDF document text
    • http://formulamoney.top/gobinavebemubakv7aw.pdfIn PDF document text
    • http://ottics.ru/54975914864c8rwa.pdfIn PDF document text
    • http://dasuwupozu.22web.org/luwijurotepulez.pdfIn PDF document text
    • http://alesyasemiletova.com/how_to_install_ms_project_2016_with_office_36530mub.pdfIn PDF document text
    • https://cdn.sqhk.co/gowomawabude/hawigxF/energia_eolica_en_mexico_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/noxivudeva/caFjdif/66829601174.pdfIn PDF document text
    • http://nutristrike-shop.ru/new_practical_chinese_reader_textbook_2_translation7d7su.pdfIn PDF document text
    • http://mivamoxejepije.iblogger.org/56868623859.pdfIn PDF document text
    • http://onesmall.space/31538448660aabli.pdfIn PDF document text
    • https://cdn.sqhk.co/retesixabe/75g8Ygg/32906302704.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fb51114-f0e9-4eb0-ae7b-bc4c0f20bb93/tizopozesirapub.pdfIn PDF document text
    • http://lifanijuw.epizy.com/hitman_blood_money_resolution_widescreen.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/jotojefenilovused.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/binesiriro.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/worojixise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54e065e7-8432-4f74-971d-dfd5e934dfae/what_is_economic_development_simple_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc52c143-6668-43c7-b7d0-7acf9e1943f4/womudila.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_off0000e2e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E1 5416 bytes
SHA-256: dff3e26ca7891838e65da4109b1accd867cf767e3235cc1a09505096b6cf749c
font_01_sfnt_off0000f54b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54B 10308 bytes
SHA-256: c9dd3d33d62b841e4b8a01fb0be9f573749fe1455b28e0e7abe0e29b2c8edf69

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