Malicious PDF — malware analysis report

Static analysis result for SHA-256 68b2d0d039f31c04…

MALICIOUS

PDF

69.4 KB Created: 2021-02-24 03:12:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 76ac9a329c24cc2d910278da3d5166f0 SHA-1: 176a98c412770bf9764b559bf48d109bd6ddf01f SHA-256: 68b2d0d039f31c043b75bfd4728a6e99485881b9457f5982cbd75ccff8f4c3f2
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, identified as a link farm, with a primary URL suggesting a lure related to 'mouse pointer games unblocked'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious document techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/wix?keyword=mouse+pointer+games+unblocked PDF link annotation
    • https://cdn.sqhk.co/kewesowovim/ijfihr0/getogexiluxixa.pdfIn PDF document text
    • https://cdn.sqhk.co/fanabezom/A6gh2ge/nudolisujapagumiburub.pdfIn PDF document text
    • https://sogitinavebifi.weebly.com/uploads/1/3/5/4/135400198/wazuwepufukizupebaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387219/normal_601b8ae97cf27.pdfIn PDF document text
    • https://cdn.sqhk.co/gejixoneku/ZKn6hjm/stokke_tripp_trapp_old_baby_set_instructions.pdfIn PDF document text
    • https://cdn.sqhk.co/zejejofe/vTVEidf/38655742885.pdfIn PDF document text
    • https://gawufuxawejax.weebly.com/uploads/1/3/1/8/131855981/letejakikuse_bubulobid.pdfIn PDF document text
    • https://kadibunafi.weebly.com/uploads/1/3/0/9/130969561/1091167.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501774/normal_6021790a38d95.pdfIn PDF document text
    • https://cdn.sqhk.co/jutigurotow/ieZigif/jawaban_dari_game_brain_test_level_38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370089/normal_60289b6415034.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ramogefakox.rf.gd/brochure_templates_for_apple_pages.pdfIn PDF document text
    • http://vaxomuterok.epizy.com/jaripibirijolubunevom.pdfIn PDF document text
    • http://pewojalosu.epizy.com/61481680260.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB437 5600 bytes
SHA-256: b11e6def4ff1e108e6fb6f10e9b3b749ab331dbb550d61a88888f2baa4ce7ad6
font_01_sfnt_off0000c72b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC72B 2092 bytes
SHA-256: 9fcfd2b2c12c9d480c0beec3ee39f05b9e518edc5177a7a5fcc68dff0371f8a2
font_02_sfnt_off0000d0cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0CC 10036 bytes
SHA-256: 030d555a5c8d95e2849c88048b75865b27d18779f3ba2924f2f92d63926f9ed1
font_03_sfnt_off0000f357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF357 16116 bytes
SHA-256: de5e424296fca6632de503ebef56d41c9898c13bba2aba3354ff7f3c3578a82d

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