Malicious PDF — malware analysis report

Static analysis result for SHA-256 36e08c2f53b55b15…

MALICIOUS

PDF

68.0 KB Created: 2021-03-05 13:43:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: afe781468d2459f64f13ea4eeca51af1 SHA-1: d738ead415e8fab617763d72deeb2102bb9c2643 SHA-256: 36e08c2f53b55b150ef1c4cdf4fa85980f4c973a5f5508ac57c7e7b23d016c34
186 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xajibur.ru/wix?keyword=day+after+tomorrow+movie+worksheet PDF link annotation
    • https://cdn.sqhk.co/vesagivara/vvGhax1/clan_dragons_dml.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365560/normal_5fcd81e0f3296.pdfIn PDF document text
    • http://jasazotinalol.mygamesonline.org/milemekawilolegiref.pdfIn PDF document text
    • https://cdn.sqhk.co/saguregifu/HgdiaF8/guess_the_famous_mommy_baby_shower_game.pdfIn PDF document text
    • https://cdn.sqhk.co/mujexoxa/hbjdjhZ/the_best_colors_to_wear_during_summer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446636/normal_602d6dd105e20.pdfIn PDF document text
    • https://cdn.sqhk.co/tatogevi/ODNwidr/natimarepimilano.pdfIn PDF document text
    • https://cdn.sqhk.co/midusuworab/jgheidM/tuzoxipunerukesepatete.pdfIn PDF document text
    • https://cdn.sqhk.co/nawafoxobok/hjggha7/microban_24_sanitizing_spray_amazon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472208/normal_6035af9dea893.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383800/normal_6036c50d9514f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481539/normal_6035bf8878eb4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3b044092-e341-4c69-a8e2-52b14fc1865f.filesusr.com/ugd/370021_7ff4309e02074db293fa86189d04f475.pdf?index=trueIn PDF document text
    • https://ba30dffa-51fe-4caa-9472-6f142403a9bb.filesusr.com/ugd/c2007e_b086a640f3bd44d9b0c3332c4af70d28.pdf?index=trueIn PDF document text
    • http://kaxuwenewutexu.myartsonline.com/joberavilefonumo.pdfIn PDF document text
    • https://a8a70d16-e3f0-4805-b115-4d8c62c40b57.filesusr.com/ugd/82e28d_fa01440d98084969a8388380e6bd546f.pdf?index=trueIn 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_off0000cd10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD10 5292 bytes
SHA-256: 2e06e00cc3688931ea100af9831c5e3478af2e9dece4bf52a418a9220e3325d1
font_01_sfnt_off0000df0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0F 10592 bytes
SHA-256: 295a860d05d53bb50d7c203d4ec98de7691c5cf7d8db7b5d92beceab4fac0d61

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