Malicious PDF — malware analysis report

Static analysis result for SHA-256 be8dd64398a11f7a…

MALICIOUS

PDF

88.8 KB Created: 2020-12-20 23:19:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a195c623e79e7d2ab764d57c99961756 SHA-1: 9e7eda0df40c86783b2af4fc38e6d4869447fd1d SHA-256: be8dd64398a11f7a3c3ae018e5e6b3d8d43653eaedc8f9a04d5acdc1777e3e36
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'https://traffmen.ru/strik?utm_term=judge+e+gregory+wells+political+affiliation'. This URL is likely used to lure users to a malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL in a PDF document is a strong indicator of a phishing or malware delivery attempt.

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
  • 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://traffmen.ru/strik?utm_term=judge+e+gregory+wells+political+affiliation In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417807/normal_5fbf213c7b845.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491159/normal_5fd672458c3df.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/9a02404f-c35e-417a-a081-9bcbf7418d4b/aura_kingdom_private_server.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/keurig_parts_list_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b8a0bdf-a491-4131-9223-bd33a7142c0b/40662965285.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/34433801885.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dacb0e35-26c4-46bd-bd30-0a42ec002ed2/nier_automata_save_data.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/611a3e44-6e7a-4036-8b8d-2f506c92b7fe/nusazivusefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd8440e1-e9f9-49b0-804c-47705f961909/sasaselodufiluforasuk.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/45341563266.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/emergency_exit_pathway_width.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62862c4e-f1c2-4d81-9832-887ec8c71c42/secret_of_the_wild_child_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20cb9cc6-ac2e-41b0-9df3-955f13d47d51/xewodopafatinepixifil.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/opening_sound_effect.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a443cfc-e949-49ef-9b27-c15cebc3187a/kingdom_of_loathing_class_guide.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104EC 5504 bytes
SHA-256: 2959a6212b8aab3b3e3394f010290eff539789b4163970352b7ece0b472ba4a5
font_01_sfnt_off000117cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117CF 12220 bytes
SHA-256: 0933653ae1a2174541b4a72e9bc64d49edb9bad51e99e38cc701dc30824c9c65
font_02_sfnt_off000140f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140F0 16144 bytes
SHA-256: 764fe263e68fd20aff2bbd96e69f5a400d440299d02096befa162391f913c7cf

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