Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6c045eed906555b…

MALICIOUS

PDF

77.8 KB Created: 2021-03-06 18:26:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 063eeaf20e51312a6cca29e50c4cd94b SHA-1: 2727f7dc2f94533266bd322a320d2d70069cd9b6 SHA-256: a6c045eed906555bd983552c153b9692ae9a567b6e63b4101a6d8e83215e3ea3
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, identified as a link farm. The primary URL, 'https://baarspo.ru/strik?utm_term=the+lady+with+the+pet+dog+joyce+carol+oates+analysis', suggests a potential SEO manipulation or phishing lure. The presence of numerous links on disposable hosting indicates a malicious intent to distribute or redirect users. While no scripts were explicitly extracted, the PDF structure and link farm heuristic strongly suggest an attempt to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/strik?utm_term=the+lady+with+the+pet+dog+joyce+carol+oates+analysis PDF link annotation
    • https://cdn.sqhk.co/sofetarunox/U51RBXR/car_x_drift_racing_2_pc_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/migazajigum/kjafRJj/police_officers_killed_in_2020_usa.pdfIn PDF document text
    • https://cdn.sqhk.co/wifavizen/giyjbbh/az-_900t00_microsoft_azure_fundamentals.pdfIn PDF document text
    • http://jemevuvi.22web.org/tuwobowidiberej.pdfIn PDF document text
    • http://bogipeborowe.sportsontheweb.net/74175190923.pdfIn PDF document text
    • https://cdn.sqhk.co/daxerarugak/ih0xifQ/alto_s_adventure_mac_free.pdfIn PDF document text
    • http://vuvodagedene.scienceontheweb.net/mechanical_design_of_machine_elements_and_machines_a_failure_prevention.pdfIn PDF document text
    • http://rejasikega.scienceontheweb.net/63126704165.pdfIn PDF document text
    • https://cdn.sqhk.co/jutigurotow/Cy2ijjg/fewenoromowoxiro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vaforapibasaw.epizy.com/60752700893.pdfIn PDF document text
    • https://3176e400-c268-4dc0-8d69-08eae86937f8.filesusr.com/ugd/ea2f88_a64f6c39068742ff98cbdeef007e3804.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7397d527-f82d-484e-9181-20c01c2b1749/6014286114.pdfIn PDF document text
    • https://486bfeb6-87d8-40a3-812f-3449909c9139.filesusr.com/ugd/81b904_f4c5967b8c6a4389b54bfa95d585b330.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/30453d98-9d1a-4093-9264-cdd39bbb8099/why_is_my_panasonic_tv_red_light_blinking.pdfIn PDF document text
    • http://zalowakudedakov.rf.gd/2019_bmw_330xi_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ef3b056-728b-4f20-bedf-7cd1137c0278/12988130677.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8917880a-0ce8-41c3-8c03-889111938f49/how_long_do_you_need_to_study_for_pmp_exam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/997ab9a5-0440-4373-acb0-c33eb4ce4710/gonawebojizapitori.pdfIn PDF document text
    • http://xesawufozimiki.epizy.com/91199067191.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_off0000e5f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F6 5344 bytes
SHA-256: dbed10cfd4f6b9e1be4888d91502d8f3498a8fc846b4b1326b27c0c16f896862
font_01_sfnt_off0000f834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF834 10268 bytes
SHA-256: 98e4df8ab5a9d5a9749fd4055fca365472e1d1b971459d6b40653ad2e73dd189
font_02_sfnt_off00011b5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B5F 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3