Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe84c744b410d63a…

MALICIOUS

PDF

78.1 KB Created: 2020-12-02 19:52:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a9e512df061135c9ff661fe84ef38a63 SHA-1: 7593170a6d73df176a9c9a28e6e3afe628f505cf SHA-256: fe84c744b410d63a9379c8631ee4b1f898cafd68a370ee05422402d3f3dcbe95
104 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan. The presence of an external URI pointing to 'trafficel.ru' and a heuristic indicating an urgency lure suggests a phishing attempt. While no scripts were explicitly extracted, the PDF format can embed JavaScript, and the ML classifier's high confidence score supports a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://trafficel.ru/123?utm_term=draw+reciprocal+lattice+2d PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380086/normal_5fa2fce866f22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457006/normal_5fa35fd3461ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419452/normal_5f9ffde5da608.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376879/normal_5f8fe3fe3105b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387699/normal_5f90eace1d8df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471085/normal_5fa96a9d9067e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf48cf145a8629dca70556/1606371535975/53349505700.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/72630057669.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6970984e-9e9a-401b-9394-109da4b65b6b/42179973298.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/rationalized_planning_system_in_the_philippines.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/53774805235.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ee0d8db-ae79-48f9-8e50-fcd862bcf575/before_the_law_kafka.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d6b6bf71053ccb290274/t/5fc58ed49ee0f32b8712279a/1606782677544/flowers_that_look_like_roses.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dafde9a-de2b-485b-a8d3-782817f2e8d2/icelandic_volcano_case_study_answers.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_off0000eb11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB11 5112 bytes
SHA-256: 2e18df2a9d3234f32ed0ed6d4ffc6ede7878b60c0ccdc19e6f18f30eb3cbbab9
font_01_sfnt_off0000fc99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC99 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00010526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10526 10736 bytes
SHA-256: a41f8e34ce21114f0d3952b6ddbebb48e29df1b2e1fbe3e2e8521f49bd407512

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