Malicious PDF — malware analysis report

Static analysis result for SHA-256 1de639222fc9a86f…

MALICIOUS

PDF

82.8 KB Created: 2021-03-18 21:08:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 803bc985ca7d65e47a04858c559281cf SHA-1: 7e9cc5c09352c487fddcb11f841d2db3e78f44f4 SHA-256: 1de639222fc9a86f5b89f28deab51de87a9463a01183894e56af339f78a04f06
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains an embedded URI pointing to a suspicious domain, which is likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create PDFs from web content, further supporting the idea of a web-based lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/strik?utm_term=how+to+engage+your+left+brain PDF link annotation
    • http://salonapp.xyz/18615626957gu3ry.pdfIn PDF document text
    • http://fakixigulidol.mywebcommunity.org/rebuv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488580/normal_6008cf3dd2d6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481065/normal_602897dac7f4e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379718/normal_5fd083a0dd8ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470220/normal_60388994e9c89.pdfIn PDF document text
    • http://onesmall.space/74491417485yuigd.pdfIn PDF document text
    • http://dotavulilego.mypressonline.com/49989435873.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372354/normal_60530ca2e3a65.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450141/normal_5fd0925c17d7b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370304/normal_5fc9296fc01cf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371246/normal_600018d528664.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381534/normal_5fca6a98b75aa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dapizodipe.myartsonline.com/79633130267.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d7d9fee-5a80-42e7-8824-35372beeb53d/93192253172.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5224bb15-8faf-46c1-8059-78ae8fa5862c/16406347039.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/33341185076.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/tasovubosaxonunepiz.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/free_ghana_afro_beat.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_off00010789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10789 5052 bytes
SHA-256: 1cc80ee552edb889f927118eb481c177a03fe53d3020208b7e508419ce26cbc4
font_01_sfnt_off000118ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118EA 10896 bytes
SHA-256: 9c14c432445f855783e30480c4168a325ed063cb2ade3ded3859e50b591f6fa0

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