Malicious PDF — malware analysis report

Static analysis result for SHA-256 b253d7e8ac61387a…

MALICIOUS

PDF

69.6 KB Created: 2020-12-31 04:58:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: cbfb258f95d7b530964e91b52a93f6ad SHA-1: 09aafe08ec9b610dae42cda4463fa67f759ad2dc SHA-256: b253d7e8ac61387aa888b7b91e92360c22209e88052251de2f618ed19866b723
196 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
  • 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://trafftec.ru/wb?keyword=lamour%20love%20all%20over%20the%20world PDF link annotation
    • https://cdn.sqhk.co/tezakagadol/9TifGjb/n64_emulator_online_multiplayer_android.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366358/normal_5fc50f3a384ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460981/normal_5fa7cdef4a3a9.pdfIn PDF document text
    • https://kazajiti.weebly.com/uploads/1/3/4/4/134456981/zitorujelopul.pdfIn PDF document text
    • https://cdn.sqhk.co/nezafomura/CgiZ3CS/guvokobozimudigobebudigeb.pdfIn PDF document text
    • https://cdn.sqhk.co/miwataxanis/iimMihw/asteroids_definition_key.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368485/normal_5f8c5e7fad37c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408586/normal_5f9d79a3dd931.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410013/normal_5fbb0a0bc73c0.pdfIn PDF document text
    • https://cdn.sqhk.co/xogedusov/ZKw0hji/5178453488.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/ZjojaFN/murdergame_portable_mod_menu_apk_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491168/normal_5fb8b102f0519.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381730/normal_5fd9437e47dae.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/40d77fc1-70d6-430f-84e3-137cce3aa679/75526621716.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95b531db-82d8-4dab-a6a3-40800064ef10/govalenupujexemez.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_off0000d2e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E0 4980 bytes
SHA-256: c3289be3afbd3ee27419c7103263731019af3aabcb15c7c7f35b9c06d56fa9d2
font_01_sfnt_off0000e3b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B8 11396 bytes
SHA-256: 9169542ab1f6f9cadcf4e2a9f25785161d0d59287d5de893f5bf292b628d6fc6

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