Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f6a1766d87b0d06…

MALICIOUS

PDF

73.4 KB Created: 2021-02-16 22:18:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4af05dd1cf528dfa9ce2711bb463dc5a SHA-1: 18b1c3a24060e336799c7d7c996f96834db18719 SHA-256: 3f6a1766d87b0d066bee61094d8b8432fe695f5d4b20f8025f253707b018428e
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, which is likely part of the attack chain. The document body, though heavily obfuscated, suggests a lure related to mower deck belts, aligning with a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/aws?utm_term=how+to+tighten+a+mower+deck+belt PDF link annotation
    • http://dogosufomume.iblogger.org/38881113240.pdfIn PDF document text
    • https://cdn.sqhk.co/nefowumik/hbiagiu/management_consulting_internships_summer_2021.pdfIn PDF document text
    • https://cdn.sqhk.co/sebutarukaw/jaKqXDD/mejijutobazuk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480898/normal_5feec6ebbf574.pdfIn PDF document text
    • https://cdn.sqhk.co/palevisi/cWgcihv/3d_supermarket_race_game_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423442/normal_6005086eb2845.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473384/normal_5fdeb99036261.pdfIn PDF document text
    • https://cdn.sqhk.co/kinemefuwa/jhypuji/difuduwazefupukuporoj.pdfIn PDF document text
    • https://cdn.sqhk.co/zibepidok/EIieI0d/mexiva.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://joduzot.rf.gd/animal_jam_play_wild_mod_apk_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/9855538777.pdfIn PDF document text
    • http://rafubapon.epizy.com/insulated_concrete_forms_suppliers_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/39007834824.pdfIn PDF document text
    • http://gaditerigasut.rf.gd/blundstone_size_guide_eu.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/year_timeline_worksheet.pdfIn PDF document text
    • http://pipovafalalum.rf.gd/95552013205.pdfIn PDF document text
    • http://niforubuduxema.epizy.com/43427851196.pdfIn PDF document text
    • http://sobenikirija.rf.gd/conclusion_for_hotel_internship_report.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/30950350384.pdfIn PDF document text
    • http://javajese.epizy.com/los_angeles_kings_schedule.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_off0000e317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE317 5432 bytes
SHA-256: cb01c2b76a63b7e32f747d83e03a216ccfb5f698a22eeb83a3d4e3f55e5bdabc
font_01_sfnt_off0000f578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF578 10244 bytes
SHA-256: 4213c443e99d32475ec2b519e4fbe1b5a568ea51394de0fdaccea993969f74e4

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