Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b617d116db60579…

MALICIOUS

PDF

75.4 KB Created: 2020-12-07 20:57:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 86b8ecc4ab574ebf307da4815ddcd70f SHA-1: e81a4816a3f1d2e3a9602b177d66744bcbc4564a SHA-256: 7b617d116db60579917a667ff886dbce3bb22cd7fa3777c89a2e63fa00f4cb0f
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 indicated a high probability of maliciousness. An external URI pointing to 'trafffi.ru' was extracted, suggesting a phishing lure. No scripts were extracted, but the PDF structure and external URL indicate a likely phishing attempt.

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=ingersoll+rand+231+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444115/normal_5fa267dd5d932.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454558/normal_5fa76a7ce3573.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386094/normal_5f8d294597ca3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482848/normal_5faaac40bb3d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411228/normal_5fafd3d565f82.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/gumegulaxi/physics_chapter_17_study_guide_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/prophylactic_oophorectomy_nice_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/calendario_2018_colombia.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/55858816082.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/nenixagotolipuvuxox.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/lipakuvefizevi.pdfIn PDF document text
    • https://s3.amazonaws.com/muguroviv/gudixalojetogabarije.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/nejuveleduroz.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
stream_002_off0000c264.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xC264 13000 bytes
SHA-256: dc39f4fbeb230c75dcebc7aa4af58d870081d7fab26c66dce89e1d7fb6dc9bac
font_01_sfnt_off0000ea37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA37 5432 bytes
SHA-256: d0277b289f69430964a979b5ad165230fbede526c5871ecd1d4717fd303f3ce2
font_02_sfnt_off0000fc9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9D 10512 bytes
SHA-256: ed2d9d6601be288ffb7d5c8458d323a15c43a2284d733a700324999861a076cc

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