Malicious PDF — malware analysis report

Static analysis result for SHA-256 65c241385210dcc7…

MALICIOUS

PDF

71.1 KB Created: 2020-12-27 20:25:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 926bdbfc8a7f9163aa34bc87512af509 SHA-1: 579cfcc3ed37fcb313b669b64fe1a7a3ca550c0f SHA-256: 65c241385210dcc7e6ec78dc57af7db961e54aee8d30b51343162c47310c0b3d
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://traffmen.ru/shook?utm_term=my+hero+academia+mobile+phone+wallpaper In PDF document text
    • https://jojusilinu.weebly.com/uploads/1/3/4/3/134343509/4243701.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376874/normal_5f8a9f12f0e08.pdfIn PDF document text
    • https://lewibodozibepa.weebly.com/uploads/1/3/3/9/133997785/129ad666.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414156/normal_5fa86d5a1e0df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476596/normal_5fa8f600cc586.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406229/normal_5f9dd80be9253.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374009/normal_5fabba4dcbf21.pdfIn PDF document text
    • https://lozugukavokukes.weebly.com/uploads/1/3/4/3/134357100/17954b2c341b1f.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/bbcc3eab-3387-40ae-b396-4fd396f01a3b/minecraft_mermaid_mod_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0f77667-0550-45f0-b3c9-3fa76d517a54/tofabeladesexexenimi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/426ac664-1ae3-41cf-a0f0-f868aeab199d/82094747785.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e923b09-545c-43ba-88a5-a9ee3a437ec7/r_2007scape_mod_jed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/137baaa1-63c6-4c69-9b48-ac24a45f04ba/percorsi_italian_textbook_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c845324-b6d5-44c6-87f4-19438a05d553/rfc_349_and_rfc_1700.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b4d60d1-f5ff-4035-9041-beec2324b50a/putafidif.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_off0000d899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD899 5472 bytes
SHA-256: ffb5d467303a09887ce8a055e0ca639a37dedbb929547b573a108eef2798bf67
font_01_sfnt_off0000eb23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB23 10652 bytes
SHA-256: d6a6cbf96398647b106cf66dd59fbedae7b46ba8259122662585fcb1ac2aeb49

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