Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7ebdbc72ab272b6…

MALICIOUS

PDF

86.3 KB Created: 2020-12-28 13:31:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 67689dd8728a9623b8e056d8834e8785 SHA-1: 7fb64834354e944488594e29a10b54373e915056 SHA-256: a7ebdbc72ab272b6a7158888f76dd8b38cd771be8ea9f459e5afc23a16367b8a
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://trafficel.ru/123?utm_term=reprap+prusa+i3+build+instructions PDF link annotation
    • https://cdn.sqhk.co/nopawuwam/aWgjjej/8363006729.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwagezo/Ejc94UJ/94890891214.pdfIn PDF document text
    • https://rigavedisibabaz.weebly.com/uploads/1/3/4/9/134902328/dupidisadamop.pdfIn PDF document text
    • https://cdn.sqhk.co/gemadaruvow/ihIuJjb/65016967484.pdfIn PDF document text
    • https://cdn.sqhk.co/pujapipiwat/ggiijlP/57485232531.pdfIn PDF document text
    • https://cdn.sqhk.co/bojojiweg/S1XJOuM/18354132558.pdfIn PDF document text
    • https://cdn.sqhk.co/lilapanorup/Cibhfjh/bisiwujidaluko.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/6cf3060c-ab51-486e-b09c-765f64d0848f/land_of_the_dead_full_movie_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d102f5a-d400-4ca7-a62c-24d29966cef5/powisekoruposi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18e8b230-4e4b-4a54-9405-004cda7d4ef4/45184256551.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/196cf66b-29d9-498e-9e9c-adb333605b66/video_app_for_iphone_and_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/328b01de-fec3-4f2f-87c5-9e321ff26246/circle_of_the_land_mountain.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a2588fa-88e9-4d58-b3ff-b2f992754199/libot.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/1981_honda_cb750_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/luwubamojigesuve.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_off000112bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112BD 5376 bytes
SHA-256: 99a22ea8fbc9e6d7b17f1a5c27b43f6282ea82a1bdf285c47dba18335e6d921d
font_01_sfnt_off0001250c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1250C 11608 bytes
SHA-256: 9ff84de21e680ce8508b80b9283c807f861bc3c31eac0b1a0db4fba41368e23d

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