Malicious PDF — malware analysis report

Static analysis result for SHA-256 45a59c5c68ad12c6…

MALICIOUS

PDF

70.8 KB Created: 2021-02-15 03:49:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d8a229e76329fc12ee943c3f4c226589 SHA-1: bb2b64c001be1e2b5f9e33e06d0d1286f0ae7138 SHA-256: 45a59c5c68ad12c6ca871a8b362a73661df590fb70fe546478616846b8b440ff
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=ash+is+our+purest+form+lighter+tattoo In PDF document text
    • https://mabobuloxulekev.weebly.com/uploads/1/3/4/6/134692970/pudesafebofapudesaju.pdfIn PDF document text
    • https://zinobelusetepi.weebly.com/uploads/1/3/5/3/135318062/vufokakuji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459929/normal_5fd635c8d7e44.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484999/normal_5ff8b96395c5b.pdfIn PDF document text
    • https://vipapixamez.weebly.com/uploads/1/3/0/8/130814430/koximelixesufi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366633/normal_60261658d933c.pdfIn PDF document text
    • https://tajurasexir.weebly.com/uploads/1/3/1/6/131606020/nazeviwepej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471960/normal_5fd660a87d735.pdfIn PDF document text
    • https://cdn.sqhk.co/sosobita/jeUijgg/jiwuxa.pdfIn PDF document text
    • https://newavutija.weebly.com/uploads/1/3/1/8/131871734/2982134.pdfIn PDF document text
    • https://bekajujoxofutit.weebly.com/uploads/1/3/1/4/131406668/17452dd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wekibik/72197661707.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/panejuguzariwafi.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/celluloid_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/45692422491.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_off0000cb11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB11 4444 bytes
SHA-256: 2bfe65dafe05f41efec632262deed4077c8b0d016285584caee4f220088b2701
font_01_sfnt_off0000dabb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABB 5304 bytes
SHA-256: 1b92d70d0dd0efdc4093b42c483d47f25d6e361e8c6058d2ad77837f5c5f3691
font_02_sfnt_off0000ec9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9C 9896 bytes
SHA-256: 5780f978de882423d5787b19388599d10127a278e9df7b9dc921366f07add727

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