Malicious PDF — malware analysis report

Static analysis result for SHA-256 67f6645facbd9e02…

MALICIOUS

PDF

69.0 KB Created: 2021-02-20 21:07:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 63ccd78980c2e58fb5e4df7a6314d676 SHA-1: 14a8c08c7fb9a15345983bc0e82cb8e75188fbd9 SHA-256: 67f6645facbd9e02244485cc08f20084ec8057f18f2f39a3ecbd37536437f423
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wix?keyword=how+to+delete+instagram+messages+on+iphone In PDF document text
    • https://static.s123-cdn-static.com/uploads/4377407/normal_5ff42c8f872d3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482230/normal_5fff73f34468e.pdfIn PDF document text
    • https://fikuvigobe.weebly.com/uploads/1/3/4/5/134582673/dulutosasoz.pdfIn PDF document text
    • https://keduwiwisa.weebly.com/uploads/1/3/4/4/134486116/vopoxorimupomak-dipidevafades-moruxamejad-nomonemeba.pdfIn PDF document text
    • https://tirilume.weebly.com/uploads/1/3/4/8/134886795/069816d.pdfIn PDF document text
    • https://cdn.sqhk.co/fusozuwalas/lChcKid/outlier_person_meaning.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470821/normal_5ff9821071f46.pdfIn PDF document text
    • http://confirmationhelpcenter.com/zizujaf7nye6.pdfIn PDF document text
    • https://cdn.sqhk.co/wimedizi/c47higp/1588019075.pdfIn PDF document text
    • https://fubalaxusagipun.weebly.com/uploads/1/3/4/1/134108832/1124418.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404490/normal_5ff2349baa379.pdfIn PDF document text
    • https://cdn.sqhk.co/wujugojuse/opjguii/business_manager_duties_for_resume.pdfIn PDF document text
    • https://nuzivepumug.weebly.com/uploads/1/3/1/3/131379706/7787507.pdfIn PDF document text
    • https://luletifolavok.weebly.com/uploads/1/3/4/3/134369244/10e2d3bb51102.pdfIn PDF document text
    • http://alex-travel.moscow/61656781369uetby.pdfIn PDF document text
    • http://lenudes.com/valopetevachvoh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bidanata.rf.gd/sd_cid_format.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_off0000d20a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD20A 5428 bytes
SHA-256: dae45b1ffdd8e79dcf1176147354d20c8b53e33efc0a6f4ec02e1df606fef392
font_01_sfnt_off0000e464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE464 10032 bytes
SHA-256: 7cebb2c6ac4dedef460f2da71c40150b6bbb5c6d33a57da257b760c9b79392e2

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