Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b827eee42c554de…

MALICIOUS

PDF

73.0 KB Created: 2020-11-18 12:51:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 703a76623fa2e12b2e8f2d1962afdacc SHA-1: 4bb6deac88e9cf42d932be49adbf9d44d0787b5b SHA-256: 3b827eee42c554de5594667e83cd72756c67fb391f23247beef58b683a707ef2
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier assigned a high probability of maliciousness. It contains an embedded URI pointing to a suspicious domain, traffking.ru, which is likely part of a phishing or credential harvesting campaign. No scripts were extracted, but the PDF structure and embedded URI suggest a social engineering attack.

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://traffking.ru/123?utm_term=definicion+de+confiabilidad+en+educacion PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427811/normal_5fb44c1fb79bb.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/96aca414-9878-43f4-b304-1814b32c23f6/javus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a29dd28c-9450-4f19-94ee-b48c8a0b58b6/22317033375.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7893d9c1-c295-4d80-b259-08c378dab5e1/57729996517.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6964d2c-d522-4198-a87b-28ec1858bb56/20230499954.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6747e543-c2f3-485a-bde1-f00306452e67/polk_audio_db652_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/297f14a7-cf0a-4438-934a-8a92855f450a/digimon_adventure_psp_full_english_patch_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a5c0192-0c9d-4fd1-81a4-1962322658e4/84902305274.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b03384c7-4852-4444-aa9e-a389b16448fb/65025419449.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9346128d-a5a3-4dde-99c9-fc31ba5e072a/vitogivo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8957eefd-82dd-476a-b7ea-7f616bab2e50/fitness_culture_gym_location.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_off0000dd7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD7D 4880 bytes
SHA-256: fe075408366c39a980ad65ea829680c5e3af4af2157e9a96ebd1f30068008639
font_01_sfnt_off0000ee34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE34 12660 bytes
SHA-256: 68fbda2367e7aea93aa24fb6af1d42b626718f6e6d1c3d300aa94f3cf16a215d