Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2df439ee3ffd2bd…

MALICIOUS

PDF

103.1 KB Created: 2021-03-10 01:31:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 2caf34f5ac13c728a7d76cb04a1e5dfe SHA-1: 09de89b624be80b746290b5102fa3a877ff3751d SHA-256: f2df439ee3ffd2bd9fecb6fd11e245862a7393876c512a054aa8b90ebd919b31
126 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external URIs, many pointing to disposable hosting, suggests a link farm designed to redirect users to malicious sites. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://gimoguvi.ru/123?utm_term=r%2526+b+chord+progressions+piano+pdf PDF link annotation
    • https://cdn.sqhk.co/mumesimasozo/ehcjfgd/kikidonuxi.pdfIn PDF document text
    • http://amst-watch-v1.club/91185643776c0iu5.pdfIn PDF document text
    • http://tophomework.space/how_to_clean_bissell_spot_clean2829a.pdfIn PDF document text
    • https://cdn.sqhk.co/gavezexu/hf4sljh/truck_driver_city_crush_game.pdfIn PDF document text
    • http://raxuvedibu.22web.org/99685954769.pdfIn PDF document text
    • http://sokuzise.iblogger.org/formal_definition_of_amputee.pdfIn PDF document text
    • https://cdn.sqhk.co/razefudixid/uSlDjbJ/zefipepodu.pdfIn PDF document text
    • http://argo-tourism.com/bricscad_for_mobilesv8cc.pdfIn PDF document text
    • http://birodavaz.22web.org/petsafe_drinkwell_platinum_pet_fountain_assembly.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/87e2b2e5-a01e-4b7e-9447-36df2cc800da/tugojo.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/82078258134.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8633bf34-cac8-4696-99e3-979e98e58342/scotts_speedy_green_1000_spreader_settings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/167fdf82-5650-4093-8a9e-e5b1c53822c6/what_is_code_of_ethics_for_teachers.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/uptodown_app_store_uptodown.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88c6b902-c802-40cf-a20b-cbc595f379f6/how_to_use_the_meat_probe_on_a_masterbuilt_electric_smoker.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/87879594588.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb87cc3f-809e-4fb9-a6c8-bd69d10db157/rinnai_ruc98i_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58ce0a77-eeee-434c-85a0-79bad84aba6d/will_there_be_a_gt500_convertible.pdfIn PDF document text
    • http://mitazitovir.epizy.com/sulowefadexogujoxeno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d959f563-4966-4108-9bf0-2ae51804b02b/66527577133.pdfIn PDF document text
    • http://bamalupit.rf.gd/722399540.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1785e4c-0550-4bbf-9311-315336680a28/altered_carbon_netflix_review.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/how_many_breaks_do_you_get_at_home_depot.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_off0001579a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1579A 4164 bytes
SHA-256: e505da1fcf7f5fd0de9768feaf2ec804d67dea88e23dd8cdbd824f9e1218d0f6
font_01_sfnt_off000165ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165CE 12260 bytes
SHA-256: d1e2df1f6f9d0ca33810e06d643207d40ee8ab99af6a3c06f4174b6eae93af19

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