Malicious PDF — malware analysis report

Static analysis result for SHA-256 816c8289fac8432a…

MALICIOUS

PDF

71.6 KB Created: 2021-03-10 08:52:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 26a40ee0e2df5e8cd01e50adaaf3344d SHA-1: c4096f26b62d7fa9adea0cc92f0b36c199bdb71d SHA-256: 816c8289fac8432a9a18e963267e7270260b2a55d400ba8df66710e73bb53f8f
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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://jottigo.ru/wix?keyword=sadlier+oxford+vocabulary+workshop+level+d+unit+5+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4501029/normal_6031741574d4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406169/normal_603c1e3e6898b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485305/normal_6006a3d4d3b94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381098/normal_603a4f2d575b7.pdfIn PDF document text
    • https://cdn.sqhk.co/metexemoraga/4t2bTgd/ice_cream_maker_machine_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504568/normal_5fd92d332ea0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419452/normal_602467d1d16af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375095/normal_60097991757b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458145/normal_5fe0120762161.pdfIn PDF document text
    • http://wepirafigezatid.22web.org/nabanemiwomedawagel.pdfIn PDF document text
    • https://cdn.sqhk.co/finepawug/ijheYih/99572283394.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421341/normal_6019d72bdd78d.pdfIn PDF document text
    • https://cdn.sqhk.co/dejuxafe/6HQtQqT/vagal.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481275/normal_5fedbdc5ea79c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480744/normal_602d00a11b4cf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489028/normal_5fccf395e83ba.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/jiphgyo/guzusavuzag.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503524/normal_60053f4363783.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jatitubez.epizy.com/2d_animation_software_free_download_softonic.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/are_2015_mustangs_reliable.pdfIn PDF document text
    • http://fomigidaxek.epizy.com/atlas_precision_sewing_machine_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/77295528885.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/46766730980.pdfIn PDF document text
    • http://xekubot.epizy.com/how_much_is_the_minimum_child_support_in_michigan.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_off0000d711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD711 5996 bytes
SHA-256: 801f1fdfd63a247057b5baf97e7f8f6c12a7def2693650ba5105aa8c97041b28
font_01_sfnt_off0000eb94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB94 10784 bytes
SHA-256: 5178a86e88c8740ef3fef9df913c6843ff5c9f3a9b53d88f63da217297fc358e

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