Malicious PDF — malware analysis report

Static analysis result for SHA-256 74d5b7095e43ebe8…

MALICIOUS

PDF

62.9 KB Created: 2020-11-19 18:42:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ccf85916da5077b6343765dd1011ed75 SHA-1: db65f08d77bc8341c305b13e8036db7330b0f608 SHA-256: 74d5b7095e43ebe8cf01f80d325883d6cf48f990903a2f368a829e56e6b8ac2a
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://cctraff.ru/123?utm_term=denali+park+weather+10+day In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388041/normal_5fb2656c3e78d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385206/normal_5fb580f83c5f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468296/normal_5faf1003a357e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379371/normal_5f905dfa89345.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369146/normal_5f8f305592557.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369904/normal_5f9e239567dd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390381/normal_5fa1be107fc93.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/aba1f217-ba4c-4ca4-b70c-6527725233d2/65423167405.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/chemical_symbols_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/xodowuziz.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/unblocked_games_776.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/skies_of_war_extended.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/15314521960.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/option_volatility_and_pricing_advanced_trading_strategies_and_techniques.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3dba985-a618-43c8-af3b-783e1c541d57/keto_fast_food_survival_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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bcc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCC6 5320 bytes
SHA-256: 83862b3afc4ea44464d25835b94a51e6e12e2853281e3671322ad85070d5fef8
font_01_sfnt_off0000cefa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEFA 9412 bytes
SHA-256: 4dabbcf75e27375ab1a6869c5d6d2e72f2498066791741915cb49fa46eaf84ab

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