Malicious PDF — malware analysis report

Static analysis result for SHA-256 0033bd7624034629…

MALICIOUS

PDF

71.1 KB Created: 2021-03-24 02:13:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: f87b7ec3d2dc44e7e56f77ee316920ea SHA-1: 8d4c2bbd2a7f0f387b9075563b5bd6a9331ad602 SHA-256: 0033bd76240346298a085a04c609dfee66ee95de460e7fd1228abc7aae61ff54
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO poisoning tactic. The primary purpose appears to be redirecting users to potentially malicious or phishing websites, as indicated by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://druttle.ru/award?keyword=400w+audio+amplifier+circuit+diagram+pdf PDF link annotation
    • https://cdn.sqhk.co/zasokolof/gdFjjff/pozabunepuxotiwax.pdfIn PDF document text
    • http://lp-consalt.ru/milawawuzu45siq.pdfIn PDF document text
    • https://cdn.sqhk.co/buruvalufe/hbj6Rge/grumpy_cat_christmas_film.pdfIn PDF document text
    • http://pro-konditer.com/48131928977iutio.pdfIn PDF document text
    • http://uscarins.info/20360697563cyths.pdfIn PDF document text
    • https://cdn.sqhk.co/lafixafif/ifGhggh/vba_select_cell_on_inactive_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/luxixumogez/NgijcB8/vujoz.pdfIn PDF document text
    • http://speak4pro.com/bizudinakuwufx4a6.pdfIn PDF document text
    • https://cdn.sqhk.co/tumosirewuw/5ogjgdx/visit_florida_travel_guide.pdfIn PDF document text
    • http://albl.ru/593962678456wari.pdfIn PDF document text
    • https://cdn.sqhk.co/tejikeluz/haigiic/madim.pdfIn PDF document text
    • http://copyrighthelpbusiness.net/how_do_you_find_the_z_score_on_a_calculatorajrd5.pdfIn PDF document text
    • http://sunny-web.ru/can_you_try_planet_fitness_for_freemkr3j.pdfIn PDF document text
    • https://cdn.sqhk.co/vibupiwoxaro/Ohh1E36/crazy_snake_worm_vs_earthworm.pdfIn PDF document text
    • http://bazis-rostov.com/hero_tycoon_mod_apk_unlimited_money15w3b.pdfIn PDF document text
    • https://cdn.sqhk.co/nonuripot/STHihac/zukunopujulidemezonowu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ecbea88f-e321-487e-b3ee-b24acecca261.filesusr.com/ugd/738632_f503606993314717afc180ee8195c1ff.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/45305263-064c-474e-a8db-8ecabb680f8b/buzazubatupunavoxapa.pdfIn PDF document text
    • https://abaaaae4-9231-44fc-b12c-ad55ebcc68e7.filesusr.com/ugd/2ca09c_aeb7f838f95a417fb5400c364da36d14.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/938a84c9-ab75-49d9-b89a-3aa550d7c357/kenosozesudupubodilusev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7717aa9-93c5-42ed-91c7-1f38ee0e7ae1/why_is_gravity_rated_pg_13.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b0bb4d0-da00-4cbd-b9e5-c3c3f919cfdc/98139108725.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d40ebd2-d027-49e0-a6f8-abc093fc6d4b/2013_subaru_impreza_2.0_i_sport_limited_hatchback_review.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_off0000d664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD664 5524 bytes
SHA-256: 59ba5330ca1a2fda96eab01a325d3f99d6417fa4c961e5db510d5d7bbb8da87f
font_01_sfnt_off0000e932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE932 10476 bytes
SHA-256: 2adecbb79b3cb23b0e2dd91b2baa5ee5faa591b1112bde349ec9c6297b51b792