Malicious PDF — malware analysis report

Static analysis result for SHA-256 4de38ed633bf0c97…

MALICIOUS

PDF

65.2 KB Created: 2020-12-18 14:21:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: b634ec1a920a37e2389e53126750e25e SHA-1: 324f48fc9035c0023334ade813df4a9ed66c7bcd SHA-256: 4de38ed633bf0c972bd38c7840e3b0eefdbc48ee9773fdfb2a8482fd438bf785
214 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one critical heuristic indicating it's a malicious redirector. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body appears to be malformed or obfuscated, but the presence of a link to 'gettraff.ru' and a large number of PDF links points towards a phishing or malicious redirection scheme.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/aws?utm_term=skylanders+battlegrounds+ios In PDF document text
    • https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/zepumajetefevafar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383308/normal_5f8d8700a5a28.pdfIn PDF document text
    • https://dukutisanag.weebly.com/uploads/1/3/4/3/134318107/8408669.pdfIn PDF document text
    • https://wizenavadabavor.weebly.com/uploads/1/3/4/5/134518239/2ff35e83d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427793/normal_5fa5ad37c5944.pdfIn PDF document text
    • https://luliguruj.weebly.com/uploads/1/3/4/8/134879099/5448613.pdfIn PDF document text
    • https://dodafuwunolig.weebly.com/uploads/1/3/4/0/134016835/dd764e88fec850.pdfIn PDF document text
    • https:////vignette.wikia.nocookie.net\\/skylanders\/images\/3\/3b\/Imagen_de_Battlegrounds.png\/revision\/latest\/zoom-crop\/width\/320\/height\/320?cb=20170523002755&pathIn PDF document text
    • https:////vignette.wikia.nocookie.net\/skylanders\/images\/4\/46\/Caja_de_Battlegrounds.png\/revision\/revision\//revision\/last\/fixed-aspect-ratio-down\/width\/320\/height\/320?cb=20170523In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/94760432622.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/fort_jackson_gate_4_directions.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/wutitinerutimivan.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/75334587574.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/modakefobanemijafag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/982725b4-79a5-4d96-94f4-c3b863708973/46184013458.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/nlt_parallel_study_bible.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cee965f7-0061-4a8c-ae88-3549e48fe839/90243159715.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/beyond_the_clouds_trailer.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_off0000be1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE1E 5400 bytes
SHA-256: 59eb6292e6f696a2797b7652d3a6c6147d1d48764a630cd2ceecd279a862f39a
font_01_sfnt_off0000d095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD095 11620 bytes
SHA-256: f5ee56c96e2e2837c8b2e8ff4bf934128c12ebbac539071a5a89d1300568ab65

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