Malicious PDF — malware analysis report

Static analysis result for SHA-256 25f8e5b5e4649b34…

MALICIOUS

PDF

66.0 KB Created: 2020-12-04 23:53:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: fd4123edaef089276f5b2d121eb88e93 SHA-1: b2d47599cdef9419c5745b3ba96c427af7b46f4f SHA-256: 25f8e5b5e4649b34d429bd9dc3de89d28d244e246e58ed560fac1a5d3194a5f1
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 critical detection score. It contains an embedded URI pointing to 'https://traffine.ru/123?utm_term=kenra+blow+dry+spray+target', which is a strong indicator of a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs. No scripts were extracted, but the presence of the malicious URL and the high confidence verdict strongly suggest a phishing or malware delivery attack pattern.

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://traffine.ru/123?utm_term=kenra+blow+dry+spray+target PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380692/normal_5f8ce58a02fa9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386080/normal_5fc3f65d8255f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378604/normal_5f9635a87868c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388062/normal_5f96399a6de4f.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/5fc5b2678139af037665e521/t/5fc708b1a907d7439cd0e86e/1606879410777/56772434895.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0b5779c08c7f2ba0be49/1606224729764/advanced_computer_repair_system_tune_for_windows.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc002d40b6b03258f30bf3d/t/5fc9a91b196a600d3c2db0ef/1607051550272/blues_music_festivals_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d554cbae-896a-4005-8dad-3dc6405f0105/dama_data_management_body_of_knowledge.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd1e0c89e1c4b8fb81223/t/5fc0e3f32dd96f5918102416/1606476794987/classroom_management_plan_philosophy.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0f699d104e5f15303db4/1606225771018/allshare_cast_ipad.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5506ab8467722f1f11d37/t/5fc751da788a962b7c2d0d8e/1606898138774/ribukagir.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc37bd13dfdd95b60e57127/t/5fc4d16a18e72e5fdb6fd0ad/1606734187915/axle_nut_socket_set_6_point.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f988e2fce462bc8c518c/t/5fc7f753e378824bd09d79ee/1606940500800/ocotillo_wells_directions.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf539af81c9a2a0c98ddc3/1606374299104/fiwekigubigepafevejisoz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc51391a8793968642310f4/t/5fc79a241d106d256bc791cc/1606916649464/creative_destruction_hack_pc_2020.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_off0000c4e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4E9 5432 bytes
SHA-256: 264d3253e7e1da305e8499cc26b62d0a8387e2e12eeac73cf84e39ee1301c5bb
font_01_sfnt_off0000d786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD786 10536 bytes
SHA-256: dc57954c6fa26850158e3f96389f1c70699543cd29ea9145b821dee9d3ff4ed9

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