Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbb9c6d14c5845d2…

MALICIOUS

PDF

83.1 KB Created: 2021-03-04 08:50:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 363485001242d6f5b4dda3625283d99c SHA-1: 1f9f0102f8d01fce798943c54b3b5d018c56d3c0 SHA-256: dbb9c6d14c5845d27818636bfdd789e7a34ebef84c19072d889b12d0f74e03d3
166 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including ML classification and a specific lure for MFA/one-time-code harvesting. The embedded URLs and the PDF structure suggest it is designed to redirect users to external sites, likely for phishing or malware distribution. No scripts were extracted, but the overall pattern points to a phishing or credential harvesting attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://ponafet.ru/award?keyword=linksys+e1200+router+speed PDF link annotation
    • http://uscarinsurance.info/63691349921ddhb9.pdfIn PDF document text
    • http://janafan.scienceontheweb.net/zelda_ocarina_of_time_n64_great_fairy_locations.pdfIn PDF document text
    • http://top-agent.ru/whispering_woods_resort_worldmarkdak9g.pdfIn PDF document text
    • http://daddytestit.xyz/learn_spanish_language_book1jc2p.pdfIn PDF document text
    • http://dosaxixapaxa.medianewsonline.com/qu_es_un_liderazgo_organizacional.pdfIn PDF document text
    • http://befotuke.mywebcommunity.org/51715965225.pdfIn PDF document text
    • http://romabeveseruzor.22web.org/gartner_report_on_cloud_security.pdfIn PDF document text
    • https://kanemonel.weebly.com/uploads/1/3/5/3/135319287/fuwasizum-bemubefokuwup-litudikedejedu-bidojoxigenilon.pdfIn PDF document text
    • http://filfex.ru/gozabubeziwuwujsvpu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sotaturorud.epizy.com/what_does_partner_wod_mean_in_texting.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/allylic_rearrangement_of_conjugated_dienes.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/army_soldiers_creed.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/direct_combination_reactions_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/angular_simple_login_form_example.pdfIn PDF document text
    • http://zitulogakapede.myartsonline.com/xazerox.pdfIn PDF document text
    • http://tifalupu.rf.gd/tijozuzef.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/wwe_crown_jewel_grades_bleacher_report.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_off00010a38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A38 5144 bytes
SHA-256: 08917f46c1cb1a54ceebe5c093587b0de7da6566b675a642cacabd28edc74b7c
font_01_sfnt_off00011be0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE0 10384 bytes
SHA-256: 8a09ba68f315283f1a901f11f703a57b5fd1a0933e886a73c62e80d6630e4284

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