Malicious PDF — malware analysis report

Static analysis result for SHA-256 f67df4b87b9b6b9f…

MALICIOUS

PDF

68.5 KB Created: 2020-11-10 10:03:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 241724356013876706dde5a33701e02f SHA-1: 6c4ae58e266a35ed9891dd02775301dd812bea7d SHA-256: f67df4b87b9b6b9f6d64e061d7dd9137491818e0c0d4a67eaa90c3aa069682d6
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://cctraff.ru/aws?keyword=puffle+rescue+game+location In PDF document text
    • https://cdn-cms.f-static.net/uploads/4420745/normal_5f9ae55eedc68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381730/normal_5f909b090eec8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465255/normal_5fa5b8e18d87b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384649/normal_5f97001a23367.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423460/normal_5fa0c5f38a5f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411691/normal_5fa1ad89a5e34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373008/normal_5f983986c9488.pdfIn PDF document text
    • https://mojenosude.weebly.com/uploads/1/3/1/3/131382274/lejokulozad_bemedamikuvofob_tabijabaj_nurezijanodano.pdfIn PDF document text
    • https://kirobobu.weebly.com/uploads/1/3/4/5/134593563/eac34df8d56e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365620/normal_5f89fb32671cb.pdfIn PDF document text
    • https://dotitikedobe.weebly.com/uploads/1/3/4/4/134493035/senitiroxikala.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403276/normal_5f9a14e5b111e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365662/normal_5f86f71607251.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC580 5204 bytes
SHA-256: 2f6981f9706e68184420f5d054338f104a3c5d773e4bab8a88c3a0a596c3e01e
font_01_sfnt_off0000d717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD717 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0000dfa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA5 11640 bytes
SHA-256: f7d66e7761e07ff03070d6ddc39b05a1284ee102f7fb1413ee2d23f71fda7a21

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