Malicious PDF — malware analysis report

Static analysis result for SHA-256 cee9828c74b84a64…

MALICIOUS

PDF

82.2 KB Created: 2020-11-23 19:27:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 95fe278222b7af8dc82e82d35dd0e302 SHA-1: 537312e7305fd3275b8a7c66b8491fbbf52b7380 SHA-256: cee9828c74b84a64f91c6c791855238a1b06c98b973c55b373f6ea0476b765e9
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffmen.ru/strik?utm_term=mandalas+para+colorear+para+ni%25C3%25B1os+de+preescolar In PDF document text
    • https://cdn-cms.f-static.net/uploads/4465707/normal_5fb87e330b506.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454665/normal_5fa7feb86f8c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387061/normal_5f935bd9f1579.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421627/normal_5f9bcc0c9da23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491433/normal_5fb582ac32a1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469847/normal_5faa14da67201.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401711/normal_5fbab78494e2a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/6e252d92-1434-47bb-8151-1937f4399b77/breezin_thru_theory_answers_chapter.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/mongoose_ledge_2.2_mountain_bike.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a67c43a-e350-4130-abf8-cc8e82cd878f/pujidafusin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f72a127d-80fb-435f-9142-6f500c74ef1b/gta_san_andreas_data_files.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a229fb6a-daea-4550-be21-36de1427bce5/hilti_te72_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/586083d4-f9f1-4d52-ad55-5df686432694/mazuladivafogogumiso.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/strike_force_hacked_1.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f61f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF61F 4992 bytes
SHA-256: 1a9ff10862039871b8e110443b0dffe1abc451dd8a22564b57159dc2ece99275
font_01_sfnt_off000106cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CF 11124 bytes
SHA-256: 0e9aeab1717a50ca96f2d096fe9ba4ba146729385593f9b101a9e130cf023850
font_02_sfnt_off00012aec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AEC 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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