Malicious PDF — malware analysis report

Static analysis result for SHA-256 16a9e7cb253619bc…

MALICIOUS

PDF

74.3 KB Created: 2021-05-22 17:09:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0c1b9fb890c205426c4ee83f30121ad8 SHA-1: d67e572f5a505ca57e3fae8652025ecbc594c063 SHA-256: 16a9e7cb253619bc98a6f8ddc6831df4e2e8a9d2d370468525856b11e052db97
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a heuristic indicating an external URI pointing to a suspicious domain, which is also listed as a high-risk URL. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

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://mezovuduw.ru/strik?utm_term=hollywood+movies+in+tamilrockers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4490244/normal_5fe34e0bb9a88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454684/normal_6026bbf217874.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365619/normal_60381e86cb800.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385887/normal_6057db1fbde38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408881/normal_5feaf29a2f20d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417834/normal_6015d5a50cadd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f888b04-aa05-4a0e-b375-0b0f53a2b1d2/how_much_does_a_windscreen_replacement_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/76009272177.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e2677be-88d7-4740-93cf-feb086aa2439/12637428360.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/lusumimik.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/foe_feudal_japan_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8396693c-bbbf-4543-b7cd-d67360569a5e/cannon_36_gun_safe_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/bujadununufavu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72f351a8-ab11-4cb2-a7cc-e3664f40e344/how_to_use_a_george_foreman_electric_grill.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/mowonenakebage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f35e7fbc-62a1-4ea3-b927-3808cdf4c22a/98952876639.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/john_deere_316_worth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76d5dee9-2dce-451b-bcda-9bef8ad9db8c/vixubebebinalogoder.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/28380553714.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bd5500d-9d77-4f07-8870-1eded048e8f7/what_can_i_make_for_vegan_thanksgiving.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_off0000e532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE532 5364 bytes
SHA-256: 726ccfdc9f44a3edc4a0da6550f5f7697ab6f93dd214eab0c5928ca47d8348a3
font_01_sfnt_off0000f76f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF76F 10644 bytes
SHA-256: 6d9a08ff1b4073c62909507b7a4b8e682dd92ffda0bd0627810ba6abdae3b85e

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