Malicious PDF — malware analysis report

Static analysis result for SHA-256 8291de69f4702ae9…

MALICIOUS

PDF

76.9 KB Created: 2021-05-28 10:12:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 949dcf6a9a348e4fdf0eef102b4797b4 SHA-1: d2a72938decb752a2c890fc08115013d03d18033 SHA-256: 8291de69f4702ae9d4857caf24dfcb1302ffc716c499186ffd15ef9fe0329f0d
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The embedded URLs likely serve to redirect users to malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://bologen.ru/strik?utm_term=tableau+de+bord+voiture+signification+pdf PDF link annotation
    • https://biwozatilajatem.weebly.com/uploads/1/3/4/6/134636438/3333401.pdfIn PDF document text
    • https://jaragamonobuwuf.weebly.com/uploads/1/3/5/3/135346236/6866827.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376404/normal_5fe6a422afa59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477376/normal_603e2c5d37b41.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402267/normal_5fc8e701475a7.pdfIn PDF document text
    • https://divuvefa.weebly.com/uploads/1/3/4/7/134759037/2694507.pdfIn PDF document text
    • https://fugogifozu.weebly.com/uploads/1/3/4/8/134888696/7596955.pdfIn PDF document text
    • https://tixosagekade.weebly.com/uploads/1/3/4/4/134489061/6400772.pdfIn PDF document text
    • https://ziluxofizavamo.weebly.com/uploads/1/3/6/0/136009732/sogudobumizujo.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/aadcaf9a3c.pdfIn PDF document text
    • https://gopogusefivow.weebly.com/uploads/1/3/1/4/131406686/16889.pdfIn PDF document text
    • https://sebaderibegagib.weebly.com/uploads/1/3/4/5/134583030/619e23af820e33.pdfIn PDF document text
    • https://lipefevek.weebly.com/uploads/1/3/1/6/131606222/26fed475b37d3.pdfIn PDF document text
    • https://tibomomaludo.weebly.com/uploads/1/3/0/9/130969572/cce38492.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/57f827ee-b0c2-4131-aabb-0769547b9af2/pivulunovetot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e118fe31-d6ac-46c6-9662-c08b7dc5b404/lulowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e1e33b9-980a-42ae-801b-b0e60b25bcc8/anti_inflammatory_foods_for_gastritis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc123aee-73bb-468c-953a-9fdcf8c4e282/36061733012.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a973065-2635-423e-9c2b-19168fd359b3/moto_g6_specification_and_price_in_pakistan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d655d279-4cac-43c2-8c02-56aa4d5c7405/weber_smokey_mountain_22_inch_smoker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/404841a2-af86-4426-86c6-b869edf79ae2/what_was_the_effect_of_the_amnesty_act_of_1872.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/baa9e03b-a380-44c3-884a-2874e83135ef/82998111075.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8f458ba-1e82-4e41-819d-2f9bf603f795/first_grade_reading_passages_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34e88a87-c855-4c65-99c4-18ada397d930/saxon_math_1_teachers_manual.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_off0000eb46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB46 5472 bytes
SHA-256: f40e4267189a004d1cf78a982b574422ba781b53ff0ca14aa027f10ca76be04e
font_01_sfnt_off0000fdf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF3 11916 bytes
SHA-256: f65f429edc7686900c252db7f7e180ad8abe146c603244292cb41fd7f011f780

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