Malicious PDF — malware analysis report

Static analysis result for SHA-256 d06a624ab2452195…

MALICIOUS

PDF

82.8 KB Created: 2021-03-30 12:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 2880f5c0d3a401b200a2102d2b8e62ca SHA-1: 4678975be0505826e3eaaf85b88cc2d8a8b56f60 SHA-256: d06a624ab2452195530456dcd195381035acfa00810de94bd45ae7eb22a3e9bb
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. Many of these links point to disposable domains or subdomains, suggesting an attempt to manipulate search engine results or distribute potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://midufefew.ru/wix?keyword=the+great+gatsby+study+guide+answer+key+chapter+6 PDF link annotation
    • http://circus.market/tibetan_book_of_the_dead_timothy_learyorvqj.pdfIn PDF document text
    • https://baxelawinojiw.weebly.com/uploads/1/3/4/3/134333718/004fb1.pdfIn PDF document text
    • http://teren.fun/nozizelu4rmyb.pdfIn PDF document text
    • https://fogujudusimasob.weebly.com/uploads/1/3/4/7/134713994/jufofirufixux.pdfIn PDF document text
    • http://myfoxing.online/pufemexaebo.pdfIn PDF document text
    • http://mosquito.codes/novawofv7fk.pdfIn PDF document text
    • http://sunshop.pro/ardas_kara_punjabi_song_videos2vz5.pdfIn PDF document text
    • https://ginadilu.weebly.com/uploads/1/3/4/7/134768391/5572973.pdfIn PDF document text
    • http://copyrighthelpptteam.com/forces_and_energy_study_guidehrfqw.pdfIn PDF document text
    • http://rankingcoach-apps.com/how_does_globalization_affect_the_filipino_culturem6cly.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/c38f7c69-341f-4608-95a7-84484e650e6f/74029774270.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f4d6a99-0cb0-42a5-a890-cc76c1fd4525/goxonevej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/561f2c01-88dc-4700-8aa2-610314d8e79e/94848505556.pdfIn PDF document text
    • http://zazofekodoxu.rf.gd/business_management_books_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eef031ad-1c71-4ed2-824a-e42c57417eb0/76193059334.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13cd371b-0ad6-4c67-9ce2-4b977036c734/76332268230.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/322d03be-2b46-4c95-b74f-f81263257edf/is_girlboss_based_on_a_true_story.pdfIn PDF document text
    • http://bilunijo.epizy.com/sasofagumafuduwupu.pdfIn PDF document text
    • http://rolaxaja.rf.gd/cameroon_food_recipes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11376bca-ca9c-40cc-89c8-496c639e3d20/18742386336.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e1594dc-81ec-4b24-8fa7-2dc086341050/what_months_is_the_fe_exam_offered.pdfIn PDF document text
    • http://zijodere.rf.gd/27606370109.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23993a60-4efb-4963-b342-f55844fa3ca3/bapagotipox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7109f387-8b97-459a-96d4-45b7dd0390b6/github_python_machine_learning_book_2nd_edition.pdfIn PDF document text
    • http://torumaxot.rf.gd/formal_approvals_crossword.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_off00010358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10358 5804 bytes
SHA-256: 25eab16652429e312c0f9202325472814400dee54885e24679b92d9cc3860c0a
font_01_sfnt_off0001172a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1172A 11204 bytes
SHA-256: d50191038b302ff79f24beee55c4f2f05e669affdbfdf42edb0b38a07fcf9dc1