Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b88b1b5a943a975…

MALICIOUS

PDF

103.5 KB Created: 2021-01-11 16:46:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f1c79d791db6e131418838f2e045a52a SHA-1: efee5286e2801ed4ffcd41229579476f68538b6f SHA-256: 0b88b1b5a943a97537f267f09edb44ce22237c7fe6c50a203dc25dece6a79954
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to 'https://trafffi.ru/123?utm_term=the+python+quants+pdf', which is likely part of a phishing or credential harvesting attempt. No scripts were extracted, but the PDF structure and embedded URI suggest a social engineering lure.

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://trafffi.ru/123?utm_term=the+python+quants+pdf PDF link annotation
    • https://cdn.sqhk.co/loxowopiv/eeuhbii/564134379.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/rnnGHjd/90656874211.pdfIn PDF document text
    • https://cdn.sqhk.co/fizuborugas/ifL1iiB/tag_with_ryan_game_play_now.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426279/normal_5fc1db972f1bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459320/normal_5fdd8f7c2b033.pdfIn PDF document text
    • https://cdn.sqhk.co/japokaxe/giqjbWy/launch_meeting_meaning_in_tamil.pdfIn PDF document text
    • https://kajefota.weebly.com/uploads/1/3/4/7/134766701/36a71331a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gupuso/caderno_pautado.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/81876167848.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/minecraft_crafting_guide_1._14._2.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/whatsapp_status_sad_punjabi_song.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/manualidades_con_papel_para_dia_de_muertos.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/business_process_management_case_study.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/faropo.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_off000100cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CB 27104 bytes
SHA-256: ab4ad0730fee30b52500080cce9d9debd1ff3305468289c577e91854612b3556
font_01_sfnt_off00015689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15689 5180 bytes
SHA-256: 6c1c030356dc46826ffa34dadc03d3f5c7d06f1464b2524d97b4dbf00540b8b0
font_02_sfnt_off00016830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16830 12356 bytes
SHA-256: e1c30fe6527b8c020140b24f463de0d7e67a8f24e16d028d1a000e8f181d4f1b