Malicious PDF — malware analysis report

Static analysis result for SHA-256 55c131cd050fd11e…

MALICIOUS

PDF

82.7 KB Created: 2020-12-06 09:50:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 49719f7580fcb5f910da78cc853fbae1 SHA-1: b01b374bae95dd8248682de51c1660aa67d34cb7 SHA-256: 55c131cd050fd11e77c2ad2a37eefa1279070a0ef5ba34debcc4de978224c4a7
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffe.ru/123?utm_term=the+book+of+life+pdf+deborah PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4480412/normal_5fbb0fb7c8670.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486197/normal_5faf981961cd7.pdfIn PDF document text
    • https://dilabugesoko.weebly.com/uploads/1/3/4/6/134627797/8c5cf378.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/5fbdfbf0bc819f1cf49ea28a/1606286322256/vepofikemerat.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/97522136898.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/16631619077.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/98365924347.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd46588c99b6d37a0e04e/t/5fcaac48a5c5764954c64c01/1607117897375/racing_race_results_irishracing._com.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/pamefi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1343bd26ff1194f75a191/t/5fc2ce623f75b1664330f286/1606602338902/the_non_designers_design_book.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_off00010b0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B0A 5104 bytes
SHA-256: da7e581b2be372d5862164396e594e611e9a2f7b4eaf6db37ceedbc5ec6edb54
font_01_sfnt_off00011c54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C54 10100 bytes
SHA-256: 6ca7aa72b93bb18bcd56a17b75359c1b5525fda58760bd3782e497ba507b7b72

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