Malicious PDF — malware analysis report

Static analysis result for SHA-256 09aa69d53c29c194…

MALICIOUS

PDF

82.5 KB Created: 2021-03-21 11:43:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5669593cc9a63332bb25c578a23aac67 SHA-1: 297ae6dc6821b35294a1f88a0fb3f64f1ddc1c17 SHA-256: 09aa69d53c29c1942e60932fef8f5196bbc9c229267217a84a3927c95af7bef6
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs and heuristics indicate it is a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links point towards an attempt to trick users into visiting a compromised or malicious domain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pelibifir.ru/strik?utm_term=ece+interview+questions+and+answers+for+freshers+pdf PDF link annotation
    • http://jumufedug.22web.org/international_journal_of_electronics_communication_and_computer_engineering_impact_factor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416806/normal_6041b37c1af01.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402745/normal_5ff4abe5c048b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491673/normal_5fdbc1f73ddbe.pdfIn PDF document text
    • http://derilezin.sportsontheweb.net/night_owl_dvr_change_password.pdfIn PDF document text
    • http://axacheat4.xyz/52740821093vb8xy.pdfIn PDF document text
    • http://sibixujuw.22web.org/vinesiwevusadadoxame.pdfIn PDF document text
    • http://dororuminaxa.mywebcommunity.org/synonyms_and_antonyms_multiple_choice_questions_with_answers.pdfIn PDF document text
    • http://indital.space/evangelism_the_heartbeat_of_godps1ow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489846/normal_5ff5abef193cf.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
    • https://uploads.strikinglycdn.com/files/0a701b1f-532e-4255-a914-a9c1635f7aec/46027902751.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1260ea28-30f8-45ad-9897-cbe2ab3e67da/kenmore_elite_washing_machine_drum_not_turning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63464069-c543-4b51-bfe6-d71399ba5aa6/what_adjustable_bed_base_is_best.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf147901-594a-4103-80a6-36b1180617bc/15144802836.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19d5353a-026e-4c6a-985b-4904969551d4/fomevuwuvezitojetek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af083dfd-ea5a-423a-a403-d002b80e977c/how_to_do_finishing_stitch_on_needlepoint_belt.pdfIn PDF document text
    • http://dutugege.epizy.com/57492424457.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d588537-6321-4761-8c4f-f7ad70da95a3/zexalatobenu.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_off0000f9e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E1 5328 bytes
SHA-256: a938d5fad12b3b6371f4a9e67ac6d498e9cac4b9544fc18f206123df5eddb8f0
font_01_sfnt_off00010c04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C04 10496 bytes
SHA-256: c89256dff639cd7a84cdfb0f3553182fbbcba17c4f2c0cab1837d8d1e42e3e54
font_02_sfnt_off00012fa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FA4 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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