Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c376cb4f68793f4…

MALICIOUS

PDF

74.2 KB Created: 2021-01-09 18:16:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ae6e5950ce20bde408e40dc13760cf23 SHA-1: bc2ce8d544e7c15bd237ec3106cd61710c4b83f8 SHA-256: 2c376cb4f68793f4fcd4b2e9e51bae51502a9e1ea6136d97b772a31e94239081
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://gettraff.ru/aws?utm_term=kalphite+queen+runescape+guide'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of a malicious URL within the document body suggests an attempt to lure the user to a compromised site, consistent with phishing or malware delivery.

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://gettraff.ru/aws?utm_term=kalphite+queen+runescape+guide In PDF document text
    • https://static.s123-cdn-static.com/uploads/4488100/normal_5fcb5ef241066.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387590/normal_5f91d2b7e6323.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/ibfjgnW/lozarot.pdfIn PDF document text
    • https://cdn.sqhk.co/rotogogoji/jhhhpXm/scarfall_the_royale_combat_which_country.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452609/normal_5fe923f871222.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/a171df7c-1fba-4d62-b8ad-13b142ef6217/revenge_spells_on_a_ex-_lover.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92104635-6585-4482-97c6-4d079ec00ca3/tabugikopedimedotur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cec7b5cf-0963-4b79-9781-5ab9b7085838/43593154562.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f6482af-5a0d-485f-ae91-21a973ad54f3/10659903892.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c982d401-2e71-42ea-aec3-21c35c712393/81394256912.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d303fdf5-6207-4c1a-9204-7807be939f8a/guns_and_roses_civil_war_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/fsu_liberal_studies_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e84f2297-6160-450b-ae4f-c15da68a24fa/71696061141.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f72f718-a1b1-403f-856f-f2f9f9917971/64069837424.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_off0000e163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE163 5432 bytes
SHA-256: eda11506f465ae8f4c51b2c1f1b47da42118f391eefa7df5839c905e215d7bbc
font_01_sfnt_off0000f3cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CF 12400 bytes
SHA-256: eab6f0013d441aba56234742edd3c50097428eb5d713ab4fe2bc62d0ca30b4aa

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