Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ab9f58f65c90632…

MALICIOUS

PDF

68.2 KB Created: 2020-11-24 03:23:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a8c6be3dac1e526a8027e6efafa3a467 SHA-1: ed3ebddd7b1e1f8b690c9ab987724f0027f31caa SHA-256: 0ab9f58f65c90632b5f4e51a5c5a56a6d372bc785541d6285ae527887be9bf6a
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains an embedded URI pointing to 'traffset.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, appears to contain metadata related to the 'Borderlands 2' game, suggesting a lure to attract users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/aws?utm_term=borderlands+2+guide+assassin PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4422906/normal_5f9c2ff54e2f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382629/normal_5fa62c6f9192a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390642/normal_5fbbd293537b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373511/normal_5f89f616e57b8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b606e83-27d7-40b7-85dd-08b5c9b5c32c/27678984240.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1952d18-f599-494d-a79d-cdc99f097123/russian_letters_with_pronunciation.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/37658645358.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/zezatewifatolexibavajizi.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/auto_clicker_app_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae0c8b78-6115-45cf-b383-e3a37ea49cd8/51662892469.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/20132600124.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/kadipofemuxarume.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/14099387606.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f836d3b8-9ecf-4f65-992f-38131138abb1/xunopimoganobidudaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/885480ed-1ea6-4756-ada0-7690237b8ce6/88656249730.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bf588aa-be5f-40a4-a5a1-3a34c831cd02/laxukizazutamuda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e08f650-636c-42e6-8231-b19267c72664/11707844760.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_off0000cc25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC25 5172 bytes
SHA-256: d4119e9de06eb2c9fc2de42281f2fbafadd2690d97512523fab1c1a696c89872
font_01_sfnt_off0000ddd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD0 11144 bytes
SHA-256: 6a953ab67cd66edef5efe0157ad1eb178f02e494122df734939ab5e783a4c581

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