Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe9d336a57b4a7f…

MALICIOUS

PDF

74.5 KB Created: 2021-06-08 11:23:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 934a79a6422ca69101eab01b6dea0e8f SHA-1: ae10dbd4bedf6e4bca02c19fe3176e208cb6c819 SHA-256: abe9d336a57b4a7f0770b847861d48c1ecf5ebaa66f06bca6b240cb89fc3fa00
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/123?utm_term=eras+bariatric+surgery+guidelines'. This indicates the document's primary purpose is to redirect users to a malicious site, likely for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for this assessment.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/123?utm_term=eras+bariatric+surgery+guidelines In PDF document text
    • https://cdn-cms.f-static.net/uploads/4477910/normal_60bedfd97c245.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375704/normal_601ab06c4bc44.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381083/normal_60074433ba436.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493541/normal_5fd150eebd46d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458621/normal_60276da582344.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449399/normal_60113523d378a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530990/normal_6028395585aea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457014/normal_6029ca730faae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421776/normal_5fe6b850c5acb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414691/normal_5fff3ecda6dde.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374847/normal_5fdfaff2e6fc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446642/normal_6022e2bd425fc.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/df1569bb-0691-43cf-8b8b-5aeb9ccc9479/can_you_control_vocal_tics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ae6aed3-b328-421c-b802-f9707ee6653c/how_much_does_a_trane_ductless_system_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16ce39be-b764-4f7c-8437-f4493d8981c0/86332673852.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a313853-92ed-4e36-8ea6-cce6df01cfd6/miniature_dachshund_for_sale_in_south_texas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54cc4e96-3e1f-4001-8095-68f5b20e6134/84565870180.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d76886d1-7e30-4566-9977-a50b6a05c29c/ancient_roman_mansion_rome_to_brindisi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24bab00d-0c0c-462b-b2fe-0d5c3c6c8c06/artemis_fowl_series_reading_level.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_off0000e55b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE55B 5304 bytes
SHA-256: d3526e6d85dbdc27c6c184362fd855ffa66e925b27e0001ef3d27d636495488f
font_01_sfnt_off0000f777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF777 11024 bytes
SHA-256: 0fb289ee02aa9c8884510ed664bbe4c880c5addd2ae4d57c5215f2c303dcd874

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