Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f42d6fa4d40eb8e…

MALICIOUS

PDF

66.5 KB Created: 2021-02-24 04:55:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 20c52def1c00570ac89730a7a04ff0da SHA-1: aa43e2dc39d97506f616679ce7aeb23373be2581 SHA-256: 7f42d6fa4d40eb8e3b4b1f1daf89db7b4dd68f5bbe001fcbc20c6e15076b969e
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://crophysi.ru/123?utm_term=free+printable+bible+crossword+puzzles+for+adults In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373241/normal_6034d3bf241c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403276/normal_5fcfe6b5ae102.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450039/normal_5fcc9ada679ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379241/normal_5ff3f6bfde0fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413575/normal_5fedd6abc7456.pdfIn PDF document text
    • https://cdn.sqhk.co/fiporalisu/v5kYhcj/chronicles_of_crime_board_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408875/normal_601703d6e2cbc.pdfIn PDF document text
    • https://cdn.sqhk.co/supopareso/jhjMgdi/55967406838.pdfIn PDF document text
    • https://cdn.sqhk.co/zoluxoni/hgjjgha/run_fast_run_game_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415331/normal_60313dc5296ee.pdfIn PDF document text
    • http://formulamoney.top/xurepo2tv23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460471/normal_5fd9d706dad83.pdfIn PDF document text
    • https://cdn.sqhk.co/nupumusu/hccjbIc/nuvunemonatakizimanetotob.pdfIn PDF document text
    • http://izzzaaa.space/2000_dodge_caravan_service_repair_workshop_manual_download901xn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382186/normal_60020a2c8f0c0.pdfIn PDF document text
    • https://cdn.sqhk.co/vifutetax/fEhciUk/venazemewivemimapubaji.pdfIn PDF document text
    • https://cdn.sqhk.co/molavagew/aJjfUij/72780856370.pdfIn PDF document text
    • https://cdn.sqhk.co/wamefuvew/gj12ljh/84457627043.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC753 5384 bytes
SHA-256: 192865d2865325440269f31958039cfdf94039c9c110764049cc0e2c2613ee50
font_01_sfnt_off0000d9c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C7 10276 bytes
SHA-256: 4605dbb529cb67cbb5e64dfab2fbcc8350348a3d65f4f1601a0c8ac44db7fe94

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