Malicious PDF — malware analysis report

Static analysis result for SHA-256 011f25280caecd3d…

MALICIOUS

PDF

73.3 KB Created: 2021-02-13 20:40:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 54432886c019e465dc56e7afd4d98681 SHA-1: 4e3fbfa58ac6724a8e0b35f5fb496a58c01bbf94 SHA-256: 011f25280caecd3d96afa2bf5a2157b7ac5335b1793684271c35f0f316dd8968
236 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://druttle.ru/wb?keyword=bahubali%202%20telugu%20video%20songs%20free PDF link annotation
    • https://zuxevuzefadum.weebly.com/uploads/1/3/0/7/130775429/9b53365d4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451045/normal_5fdc7a0b207ce.pdfIn PDF document text
    • https://cdn.sqhk.co/bilanogakiw/dOUtFPr/50424534018.pdfIn macro / runtime command snippet
    • https://cdn.sqhk.co/xejudawadoni/dD1CKgd/67575395647.pdfIn PDF document text
    • https://cdn.sqhk.co/gisusisabez/Xz0rggj/thrive_island_survival_mod_apk_2._8._3.pdfIn PDF document text
    • https://xusopulude.weebly.com/uploads/1/3/1/0/131070786/mirulidugulekidobov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366964/normal_5fee4a312336d.pdfIn PDF document text
    • https://cdn.sqhk.co/bijininabex/hbhhSmh/tulojopagi.pdfIn PDF document text
    • https://genebametujo.weebly.com/uploads/1/3/4/9/134904617/ab7d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451045/nIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/correct_bicep_curl_form.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/fevuruganeleluzigeba.pdfIn macro / runtime command snippet
    • https://s3.amazonaws.com/fuwenoxuzasila/autocad_plant_3d_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/schneider_soft_starter_ats01n222qn_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/meronekawupep.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/70662307200.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_off0000e154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE154 5548 bytes
SHA-256: 38efc1f9716b8c098f75fa8158ea8fef27c3da57215f06728e36ab1ecc2ee9cf
font_01_sfnt_off0000f436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF436 10724 bytes
SHA-256: c73b1eb8099a23f8cfbff49915333128e30474c496f7a8e970dc0cc6a9e4817f

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