Malicious PDF — malware analysis report

Static analysis result for SHA-256 01187b40fd596543…

MALICIOUS

PDF

92.3 KB Created: 2020-11-18 23:52:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 5886dc074842c97337983d2256e8d7ce SHA-1: cba55f44a4e4d8309d7ece74c2480e84248ea755 SHA-256: 01187b40fd5965436cec4de2d1b2a90706cb366a80789c53d0d9057b9eb38aa5
196 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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/wb?keyword=excel%20vba%20get%20current%20date%20format PDF link annotation
    • https://refanoripusegu.weebly.com/uploads/1/3/4/3/134306014/4625ec56dd3a.pdfIn PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/b7841d6.pdfIn PDF document text
    • https://pebezudaxefen.weebly.com/uploads/1/3/4/3/134347708/7192e0c19460ee.pdfIn PDF document text
    • https://buximinolid.weebly.com/uploads/1/3/1/3/131381316/tutejizejepakebulafa.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/4b953ea6-e86a-4498-8400-3645599bd4ca/brasil_uma_biografia_lelivros.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8831468f-3227-4b51-91b0-1fd1fa99afb2/lasog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04ab1fea-8bcb-4f5e-b3be-8d84311e7418/98097946787.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e28dc53-55aa-45be-af7f-5fffc9310301/5365922249.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43b0b96b-8305-4360-896e-24ed94711719/66420772111.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ff75186-05fb-44ea-9f74-30021a3b309e/61451750006.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62b7db98-711b-4c82-82ea-c9d7bb7563f8/7386993303.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee708a4a-e5b0-4668-b07f-fbe28828dc57/file_download_json.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06c4a9b7-5f3f-4352-94f7-55dcf602348a/wuwixopa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c3c7763-fafe-41ae-86b5-f4b94a89ec25/61914361273.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_off00012c49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C49 5388 bytes
SHA-256: 711f7513a02404cbc19757bda55870878438501a3f0a5538e2125f1240ea59f6
font_01_sfnt_off00013e9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E9C 10936 bytes
SHA-256: f60822ba01a360c1dfb2c3f8a8438ad1c726068c9e2d2298478364affef7214f

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