Malicious PDF — malware analysis report

Static analysis result for SHA-256 04b138dee9f8e2ed…

MALICIOUS

PDF

90.5 KB Created: 2021-04-21 08:15:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 7334b6f8b5cda37f359f63c7b6fda0cb SHA-1: 1ab874595b28e0f5a86d763db716e31bf0ba7c31 SHA-256: 04b138dee9f8e2ed66d2c104deb67dd84ed3b7c0b3123cf6953a071b51f63448
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to PDF files, suggesting a link farm or SEO manipulation tactic. One prominent URL, 'https://baarspo.ru/strik?utm_term=samsung+aquajet+vrt+parts', is flagged as suspicious. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links indicate a malicious intent, likely to direct users to phishing or scam content.

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 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.
  • 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://baarspo.ru/strik?utm_term=samsung+aquajet+vrt+parts PDF link annotation
    • https://lasasokuvob.weebly.com/uploads/1/3/1/6/131607269/marowe_reniz_xumatosis_vubigidago.pdfIn PDF document text
    • https://soravetojovon.weebly.com/uploads/1/3/4/8/134890923/disijuzuwokopotov.pdfIn PDF document text
    • https://latimemoniborij.weebly.com/uploads/1/3/1/4/131437487/6343836.pdfIn PDF document text
    • https://vilomaranetuxer.weebly.com/uploads/1/3/4/5/134502128/3902835.pdfIn PDF document text
    • https://xanovisawedota.weebly.com/uploads/1/3/2/8/132816091/roliso_xaniguxakesexo_zomitefariwag.pdfIn PDF document text
    • https://luludosob.weebly.com/uploads/1/3/4/7/134703274/2991672.pdfIn PDF document text
    • http://mawuluma.22web.org/rivifodoxeluvedosamudu.pdfIn PDF document text
    • http://lokusenikuxole.iblogger.org/fafawolevupuzipiwu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/yes_we_vibe_coupons.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/25218898390.pdfIn PDF document text
    • https://s3.amazonaws.com/dexodekelaseki/how_to_review_pics_on_gopro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7162d89-a77b-4366-b19a-faa01d8467db/itil_v3_service_transition_processes.pdfIn PDF document text
    • http://radikabo.rf.gd/katalog_ac_panasonic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb351ef7-cf3e-4a4b-ac2c-0369252c9787/94140260882.pdfIn PDF document text
    • http://pejulok.epizy.com/cissp_study_guide_eric_conrad_latest_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/942dd8cc-5632-4b1c-a8fb-55639fda5c6d/pedagogy_of_the_oppressed_chapter_2.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/chemistry_of_antimalarial_drugs.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/how_do_i_write_an_application_letter_for_the_post_of_a_nurse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b665e6e5-45b8-47be-991f-25ec96d35ac0/fun_writing_activities_for_middle_school.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_off000114f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114F2 2996 bytes
SHA-256: a525018001ef6fe7802f4f70a80245b913604cf2acac0d377e4495efdc91a94f
font_01_sfnt_off00011fb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB6 5472 bytes
SHA-256: dbb2f4aeb768d08515623d824b76509ba8155a4a39d8827c45cbf30725c3ccf9
font_02_sfnt_off00013247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13247 12648 bytes
SHA-256: 2ac72d3b13207ac3679dfd6cc7d8e39527e293cf7e688170782b3318cbfeacce

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