Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f6bb0b74cb4ba5e…

MALICIOUS

PDF

89.0 KB Created: 2021-03-03 07:03:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 04327c9ba5ead6a7edc2bea0f4fc29cc SHA-1: 9dcd070d83c6055409bf8254f480bc3784fc3513 SHA-256: 4f6bb0b74cb4ba5e62bd48ae940e1f65a549f74e16671d742d84693344b3c0a0
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xajibur.ru/wb?keyword=can%20you%20have%20popcorn%20on%20a%20candida%20diet PDF link annotation
    • https://xupusunozad.weebly.com/uploads/1/3/1/0/131070799/xogadus_sabozefovupisoz_vusagivuwabo.pdfIn PDF document text
    • https://cdn.sqhk.co/komagiju/giidPhe/hidden_valley_ranch_secret_sauce.pdfIn PDF document text
    • http://poroda.site/customer_satisfaction_survey_template_emailm9q72.pdfIn PDF document text
    • http://smartcoin.design/new_england_roast_beefc6i6z.pdfIn PDF document text
    • https://zubosevofugojat.weebly.com/uploads/1/3/4/3/134307347/ef66d9.pdfIn PDF document text
    • https://zedowegekinusil.weebly.com/uploads/1/3/3/9/133997302/jowoxulumupiwir.pdfIn PDF document text
    • https://wunawewob.weebly.com/uploads/1/3/0/7/130775592/6917139.pdfIn PDF document text
    • https://cdn.sqhk.co/piredonina/vSOja3s/virtual_canva_social_media_posts.pdfIn PDF document text
    • https://vokubopupabilu.weebly.com/uploads/1/3/4/6/134691430/dolazenorivofu.pdfIn PDF document text
    • https://cdn.sqhk.co/fupokonabat/ibjbtzN/gx_monsters_mod_apk.pdfIn PDF document text
    • http://coins24h.com/cancer_information_analystxdk2c.pdfIn PDF document text
    • https://bolomomotune.weebly.com/uploads/1/3/4/7/134762543/tevavof.pdfIn PDF document text
    • https://cdn.sqhk.co/bivadudit/jbcPgjz/49208712313.pdfIn PDF document text
    • https://cdn.sqhk.co/tizadufof/bgjIOgf/65031654232.pdfIn PDF document text
    • https://cdn.sqhk.co/riragimi/hciejao/fodazixuzerinej.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
    • https://s3.amazonaws.com/zamuriza/aluminium_sheet_metal_material.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/how_to_fix_a_dryer_that_wont_turn_on.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/20517283033.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_off00011305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11305 5016 bytes
SHA-256: dd2e37c8be80a19eb246794e0fab294a4cb50a5c722acebc8e4458e194082b16
font_01_sfnt_off0001241e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1241E 10728 bytes
SHA-256: 21aaa7586b6ba7e453c5e6f623358a097acff527831361f54eab01365657ab82
font_02_sfnt_off000148c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148C5 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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