Malicious PDF — malware analysis report

Static analysis result for SHA-256 11a504312ed67547…

MALICIOUS

PDF

72.8 KB Created: 2021-02-16 21:52:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 0a539778cb958b185142f0d2a5798ea3 SHA-1: d558a2712306478489a83ea045bfcd8909a7c940 SHA-256: 11a504312ed675470d58d805ea0af48fc473739f65b7a24953c4eaef566de045
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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.
  • 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://yafferge.ru/123?utm_term=differences+between+game+maker+studio+1+and+2 In PDF document text
    • http://najitop.22web.org/xuwizibisulodogimos.pdfIn PDF document text
    • http://faketikus.22web.org/top_android_games_apk_mod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371005/normal_60261c0b1d114.pdfIn PDF document text
    • https://cdn.sqhk.co/mujowofapubi/fhe0Sjj/file_manager_download_for_mobile_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484820/normal_5fe2bee106c93.pdfIn PDF document text
    • https://debimagobu.weebly.com/uploads/1/3/1/6/131637583/83b8c.pdfIn PDF document text
    • http://ridegibulas.22web.org/xinegusulidomipulul.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/hgiidii/pipijibotik.pdfIn PDF document text
    • https://cdn.sqhk.co/fagaxirupunu/djiigjw/74084210682.pdfIn PDF document text
    • http://gopefafapojawod.iblogger.org/facebook_cover_photo_2019_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369772/normal_600a56f66b424.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4506063/normal_5fd7eb9bd5eda.pdfIn PDF document text
    • https://cdn.sqhk.co/midipijikami/cAaLhVL/mesukutexi.pdfIn PDF document text
    • https://cdn.sqhk.co/barugogip/ZLtE8ie/stackable_washer_and_dryer_for_sale_cheap.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/vebenok/sufetepijeworonuzogufux.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_off0000ded6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED6 5788 bytes
SHA-256: f637e48d9d5d14090aae972a53c511ba17bbc0072e503db85d6487bb34b996f8
font_01_sfnt_off0000f297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF297 10444 bytes
SHA-256: 530f4333b34fdacb28f0f737c89111d798b64661a5bae5e1f3de6448b2b3bc48

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