Malicious PDF — malware analysis report

Static analysis result for SHA-256 74bb3f3f8905568f…

MALICIOUS

PDF

70.7 KB Created: 2020-11-10 01:34:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f735f10387df8fda98c7bb101dac3b67 SHA-1: c93855f02008a355cb62cf24d747feb52305b8eb SHA-256: 74bb3f3f8905568f8eee11f0be2e0266b983d5b0703969877e6b05684407bd84
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffine.ru/strik?keyword=community+service+worksheet+printout In PDF document text
    • https://cdn-cms.f-static.net/uploads/4414696/normal_5fa6ce8fe4bcf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376625/normal_5f9f28c57bdda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370740/normal_5f8a9a02cfb5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373281/normal_5f8d72195eee9.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/e10192ed-b5e7-49f3-808c-f8c958b26850/you2_price_pritchett.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5005f823-cffd-440c-8029-6ce9928e0978/rap_yapma_programlar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94b27297-8118-4647-8675-3aaea225bb9d/73405450373.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e2567bd-6afc-407a-8f47-02fbc0d032bb/kojexebix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de2792a7-3eb2-453d-aef1-1593d67857e2/4535387139.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/037ea732-ec35-49db-ac84-1b8e068d87ed/socorro_consolidated_schools_phone_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4115b31f-a529-4734-9b0e-9ab2cccb76f0/latest_zygor_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3452a1d4-09d7-4376-8b5b-3a8f2df89d2b/lightroom_premium_apk_3.4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57bd88a6-458f-4fb4-966f-495d9eb5f74d/fatakutijubutavawugomumaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04f3a6be-4bf3-4dab-9c9f-81c767e5cba3/95829393002.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13b2b898-1db1-47a4-930c-bb8aa670133e/slogan_game_with_answers.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_off0000db11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB11 5152 bytes
SHA-256: 68b777190c06d4d8c1be19d6744a2e7e89b3a64c75f0af26d2a2804235a0dc7b
font_01_sfnt_off0000ec8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8F 9760 bytes
SHA-256: 55d2b30c599b9ce36662075f2ae960e3e6b92f34794d6e0159bb03b1dc2ce0c7

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