Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d68ba30834b5fd3…

MALICIOUS

PDF

66.6 KB Created: 2020-11-11 15:38:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: f91bcc7a3dfd9468f91270acce8ec6cc SHA-1: 298935676e571fb288d11d9cfe4284ecbf24a026 SHA-256: 1d68ba30834b5fd33d559a85bcc99d55640b58d6b9ae3b70f30d714361228b83
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/wb?keyword=san%20judas%20oracion%20milagrosa In PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/5058540.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380543/normal_5f9da4a4be9ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413016/normal_5f9c5015e2d57.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/zetare/506_assignment_answer_in_english_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/dead_raiser_team.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/sesame_street_zoe_dance_moves_trailer.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/68520027878.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c409cb9-4cd8-4b5b-97d3-e98a94a663ca/superbook_app_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60c3a60e-42d1-499e-ab45-8c2410f8ceff/88741278030.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/085f3000-2028-4ed8-9b03-baebcb13ded7/rifabudew.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/diabetes_60_system_scam.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_off0000c6a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A3 5436 bytes
SHA-256: dcaef7e308f04a211219030c08194e40d337217f2242ab86ddc8d17bd1f9bbbf
font_01_sfnt_off0000d90a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD90A 10816 bytes
SHA-256: f19cb91b92ba740a42f08e54cb89de51bec147af4d8fed67b67060b8f227618b