Malicious PDF — malware analysis report

Static analysis result for SHA-256 f34787ba6528743b…

MALICIOUS

PDF

74.8 KB Created: 2021-01-08 14:44:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 91b38fcb4ab98b2e4ff02415da99a93d SHA-1: e78c6d9f3cd2772e968af0f8f669b692af7f5ac7 SHA-256: f34787ba6528743b699d9468fb714111889ae58e10fe36cf5bcff46013079ea5
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL, 'https://trafffi.ru/aws?utm_term=anime+games+online+free', is likely used to redirect the user to a phishing or malware distribution site. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to exploit users through a deceptive link, consistent with phishing lures.

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://trafffi.ru/aws?utm_term=anime+games+online+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424997/normal_5fc11dc3836bb.pdfIn PDF document text
    • https://cdn.sqhk.co/xetasenuwoji/cijWjdb/healthy_milkshake_recipes_for_weight_loss.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490949/normal_5fde593c0398f.pdfIn PDF document text
    • https://cdn.sqhk.co/lewulula/ghxrNii/mikitebiboro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371244/normal_5faf71d7c7350.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368770/normal_5f9a5781d8bc1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420019/normal_5fc8354a2bed5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/575287fb-106b-4adb-8448-d901753fbba7/tamegijururefa.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/humoral_and_cell_mediated_immune_response.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/833b309e-0619-4e96-9ace-2f15b9b8a6b4/ocean_beach_unit_3_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b192f7a6-0813-42c9-9fb3-a1dc9a954ef0/vapajuxodupakunufe.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/la_granja_del_doctor_frankenstein.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0A 4784 bytes
SHA-256: 5cc86970f97cb4cec0332d9d91b59636df229d7da73cf41d0833700ac5a6971c
font_01_sfnt_off0000eb1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1C 11044 bytes
SHA-256: bf767129eddbe89fad952c5a0b113fa74ad45b1a84fed3567b4cb356d9f1351d
font_02_sfnt_off00011093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11093 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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