Malicious PDF — malware analysis report

Static analysis result for SHA-256 59c067cd2cc1b273…

MALICIOUS

PDF

69.1 KB Created: 2021-01-05 11:16:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: c38337a15fe313fe38c62bfc4acbbffc SHA-1: 79788066f290dee7c79dd80fa13f8d70cb52890b SHA-256: 59c067cd2cc1b273d998f5d27b9aae19b4d83f187e910c5546307ae0e6a27be5
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://traffking.ru/aws?utm_term=physics+today+march+2018+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4449014/normal_5fe9056e505f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479454/normal_5fdc552edc816.pdfIn PDF document text
    • https://fakanodadix.weebly.com/uploads/1/3/4/3/134371587/papuded-goxadox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377704/normal_5f97d69e38681.pdfIn PDF document text
    • https://nenerulo.weebly.com/uploads/1/3/4/6/134696163/798914.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471988/normal_5fd7d1afb4e09.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496810/normal_5fe4eb7ea31ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417140/normal_5fd8feb4d1a52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403264/normal_5f9c9dbd67a1f.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/jozaponi/sigijinirajomome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4ddf27c-5707-4e73-83af-3413fee7caaf/audi_tt_manual_boost_controller.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/81628675267.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62737bbc-f5a1-4ae6-8c49-ae597fcf3b49/50311624026.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/the_economist_5_may_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c132d37b-ee7f-45ff-8456-24b2c5b36f5c/legendary_game_of_heroes_free_gems_no_survey.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_off0000cd86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD86 5988 bytes
SHA-256: 0327ea1474c34264132bedfceffc4d0752c02ce97608cd91321677e9bf572b7a
font_01_sfnt_off0000e1c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C8 11120 bytes
SHA-256: dd26936f25b777df44f80edb01054a6ea3b7618626cf807ea92ecd5252ee58ec

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