Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cd5a254fba062ef…

MALICIOUS

PDF

82.7 KB Created: 2021-01-21 13:21:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 01ab7bf83fbdfe2b5c43a73ba4a26350 SHA-1: fb87477216d1dd5dcb0ee0f67f41c5bdb5cb9782 SHA-256: 2cd5a254fba062efeff2299f8990fd2d333b19efd7862743681dfaba46e4124c
126 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it's a link farm designed to redirect users to external sites, with one prominent URL being 'https://trafficel.ru/aws?utm_term=cancer+star+information+in+urdu'. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or a scam. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a malicious document designed to redirect users to potentially harmful content.

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://trafficel.ru/aws?utm_term=cancer+star+information+in+urdu PDF link annotation
    • https://site-1235963.mozfiles.com/files/1235963/kobe_bryant_on_lebron_james_lakers.pdfIn PDF document text
    • https://cdn.sqhk.co/bexoninodag/jaxiso5/strikeforce_kitty_last_stand_unblocked_games.pdfIn PDF document text
    • https://cdn.sqhk.co/regomesu/dvhczje/zenkit_vs_trello.pdfIn PDF document text
    • https://cdn.sqhk.co/xemugugafot/fHkLTs1/rorubamabopa.pdfIn PDF document text
    • https://zawiwiguxasawum.weebly.com/uploads/1/3/0/7/130739629/timev.pdfIn PDF document text
    • https://site-1221861.mozfiles.com/files/1221861/journal_of_cluster_science_impact_factor_2020.pdfIn PDF document text
    • https://site-1173325.mozfiles.com/files/1173325/wupuledarukedumi.pdfIn PDF document text
    • https://site-1166597.mozfiles.com/files/1166597/muwovijiwebulojof.pdfIn PDF document text
    • https://site-1175669.mozfiles.com/files/1175669/vimabopipogamedow.pdfIn PDF document text
    • https://rabizelen.weebly.com/uploads/1/3/1/4/131453176/ef3c3.pdfIn PDF document text
    • https://site-1176697.mozfiles.com/files/1176697/70129589669.pdfIn PDF document text
    • https://site-1200561.mozfiles.com/files/1200561/la_boheme_charles_aznavour_sheet_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/jinabisura/biceps_workout_at_home_without_equipment.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/aol_messenger_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/challan_format_under_gst_act.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_off00010699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10699 5040 bytes
SHA-256: efd69173a0f56a696c40b0afee3e2b5342decc04b21e129cce2eaf3010cc893d
font_01_sfnt_off000117a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A3 11132 bytes
SHA-256: 388b69509a5578ee49fedbaa20aa5eb76479e8101e65e3da57d74e07e395fdfe

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