Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bc95efe45e8b0dc…

MALICIOUS

PDF

79.0 KB Created: 2021-03-15 16:32:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44e328b23b9f9ef27e3ace3ba5420fe5 SHA-1: 923b6268e10634382234275925d8198c1848e2f0 SHA-256: 3bc95efe45e8b0dc79300e498bf253e2e7e5fd138490fefade8b4a94fe2f986f
164 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing or malware distribution campaign. The presence of a large number of external links, many with numeric slugs, suggests a link farm designed to attract search engine traffic. The 'SE_DOWNLOAD_BUTTON' heuristic indicates a deceptive call-to-action, likely intended to trick users into downloading further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/award?keyword=iit+jee+organic+chemistry+notes+pdf
    • https://cdn.sqhk.co/veludewozen/gfgOFgd/vovujuradizowirafavut.pdf
    • https://sezunugavekavo.weebly.com/uploads/1/3/5/3/135321765/zojipow.pdf
    • https://dixonojobu.weebly.com/uploads/1/3/3/9/133997274/3ec0aa.pdf
    • https://wabexerimib.weebly.com/uploads/1/3/0/7/130739061/94b3613fdf9fd.pdf
    • https://static.s123-cdn-static.com/uploads/4379720/normal_60088af36bea7.pdf
    • https://mosejibufo.weebly.com/uploads/1/3/4/4/134437632/9725333.pdf
    • https://cdn-cms.f-static.net/uploads/4389616/normal_600f93a4dbc76.pdf
    • https://cdn.sqhk.co/wuzosiboweja/4Ao2ghg/hot_rod_show_castlemaine.pdf
    • https://bowulujakem.weebly.com/uploads/1/3/1/0/131069806/6122709.pdf
    • https://cdn.sqhk.co/dexediwiboze/2ejbhdc/sowojubuwofusez.pdf
    • https://wasaxedunup.weebly.com/uploads/1/3/1/4/131453111/vetomobozosero_nelanuviri.pdf
    • https://cdn-cms.f-static.net/uploads/4444853/normal_6027cb65ce872.pdf
    • https://wekexodaxax.weebly.com/uploads/1/3/4/7/134713384/faf14f6f5.pdf
    • https://cdn-cms.f-static.net/uploads/4445742/normal_603bfe7100404.pdf
    • https://cdn-cms.f-static.net/uploads/4409255/normal_5fd30d55eef98.pdf
    • https://cdn.sqhk.co/xolanikipiz/hggijgr/fofodor.pdf
    • https://vesekukoluvili.weebly.com/uploads/1/3/4/7/134759730/zuxole.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/ligole/2011_polaris_ranger_500_efi_wiring_diagram.pdf
    • https://s3.amazonaws.com/kosipefojaw/mefoborazojesojugidokijub.pdf
    • https://s3.amazonaws.com/lomogas/sokisalaf.pdf
    • https://s3.amazonaws.com/sumesawoxajew/gixuxijudeg.pdf
    • https://s3.amazonaws.com/benuka/lagu_addicted_to_my_ex_planetlagu.pdf
    • https://s3.amazonaws.com/bezegoluzose/autocad_2016_product_key.pdf
    • https://s3.amazonaws.com/widofafane/43720326514.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4b5.bin
3a70e09225b446fd0418e814cf8dc38283ff59f1e002c998f61ac3dd29fab599		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B5 5652 bytes
font_01_sfnt_off000107d1.bin
c1fed95896ac2429464cef0f016eb5d0f0fb04fe60e2ac62c1cd3f7b20937fbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107D1 11244 bytes

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