Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce8a3da12edee60c…

MALICIOUS

PDF

69.4 KB Created: 2021-01-21 07:42:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d741e8873105ac7f5f3f6cf2e0849407 SHA-1: 919d031e1b9bfc127b19609269f85ddd7488fc1c SHA-256: ce8a3da12edee60c1b1856f886d455e28fd0c9be4a48ccb7af920f692daee19b
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://crophysi.ru/wb?keyword=restaurantes%20ericeira%20tik%20tapas In PDF document text
    • https://cdn.sqhk.co/mepowokugo/iiicieC/jalatixinivukuti.pdfIn PDF document text
    • https://cdn.sqhk.co/zokuwagopole/rgc5ibd/81575645275.pdfIn PDF document text
    • https://cdn.sqhk.co/bugabowozi/hdjejjo/46032408605.pdfIn PDF document text
    • https://cdn.sqhk.co/numavagoko/hjjUugi/true_skate_gaps_factory.pdfIn PDF document text
    • https://cdn.sqhk.co/lerapuraroke/hghbibl/adventures_of_stickman_download.pdfIn PDF document text
    • https://cdn.sqhk.co/pukazibat/NBiihd6/wazijopalis.pdfIn PDF document text
    • https://dudazesulibo.weebly.com/uploads/1/3/4/6/134639231/1e8b3.pdfIn PDF document text
    • https://cdn.sqhk.co/lilapanorup/UMovWUo/89664055389.pdfIn PDF document text
    • https://cdn.sqhk.co/potebuso/jg4hbsS/torque_burnout_cheat_codes_android.pdfIn PDF document text
    • https://cdn.sqhk.co/kafufojugure/ggij5hd/roblox_soul_stone_simulator_how_to_get_mjolnir.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/xutomoxu/xileluberameja.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/21008439929.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/spca_cat_adoption_form.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/xemexamoxom.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/29246720152.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_off0000d0b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B8 4968 bytes
SHA-256: f52a4d6b6db89472010cd58cf47d19b9e8044807549e4f3bdfb5bb1b5dae417c
font_01_sfnt_off0000e1b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B3 11520 bytes
SHA-256: 67ab9602697c1ef3577b837d94617abafa2301dff24e5c5de890c42cf9ab7653

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