Malicious PDF — malware analysis report

Static analysis result for SHA-256 edaf0d1ff3817f22…

MALICIOUS

PDF

74.3 KB Created: 2021-04-06 17:37:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c32523c7b2bb439fad30253250654c7 SHA-1: 2089d0e2c3f932bfc360c707eda60f7e29692957 SHA-256: edaf0d1ff3817f22a7b206513f320810697a17c54a8d2058970b9343046c073e
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying a 'PDF_SEO_LINK_FARM' suggesting a large number of outbound links intended to manipulate search engine results or direct users to malicious sites. One prominent URL, 'https://midufefew.ru/award?keyword=a+dozen+a+day+piano+book+2+pdf', is flagged as suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 5

  • 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
  • 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://midufefew.ru/award?keyword=a+dozen+a+day+piano+book+2+pdf
    • https://cdn.sqhk.co/jagejope/g21fGjj/24965991130.pdf
    • https://cdn.sqhk.co/xeduwukaxusa/gjfxhgb/dilufidababifodewa.pdf
    • http://nomenowunesazoz.scienceontheweb.net/the_adventures_of_tom_sawyer_very_short_summary.pdf
    • http://potozafit.medianewsonline.com/77128393638.pdf
    • https://cdn.sqhk.co/wobivada/gnhfshc/wadley_farms_castle_wedding_cost.pdf
    • http://kedepoba.sportsontheweb.net/7853838503.pdf
    • https://cdn.sqhk.co/sileluzorupo/9leZXlz/49230346227.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/xalasawu/41075791012.pdf
    • https://s3.amazonaws.com/sefipa/58930399035.pdf
    • https://704d67de-a0ba-412a-a77d-f8c4cf0d88a3.filesusr.com/ugd/a83d94_ba75667d46f74de8884b581b7048a747.pdf?index=true
    • https://s3.amazonaws.com/bajapovogam/wewagotejipijul.pdf
    • https://81da36f4-dec6-4bf4-836b-19ed67500659.filesusr.com/ugd/5fd5c1_8b905e0e6a7848269ab030f912cfd3fa.pdf?index=true
    • https://s3.amazonaws.com/wazagidonux/25679799305.pdf
    • https://cc0b58a5-7bf4-4b41-9cd7-d9bc0cd2cc6f.filesusr.com/ugd/6dc98b_23f9bf3989b049f2a7b0b428fc47dd0d.pdf?index=true
    • https://s3.amazonaws.com/roxawo/husky_dog_hd_images.pdf
    • https://e4fb9bf1-a3d6-4767-9bf2-2a1021e5dc09.filesusr.com/ugd/53cfc7_730bdd82672b4b36b70a5e5974c47d36.pdf?index=true
    • https://4e4301d6-cc9a-4939-960a-6b497c1efea6.filesusr.com/ugd/d78803_4e6c24a9ee2241c8afb49d3476ac1b61.pdf?index=true
    • https://s3.amazonaws.com/batoragubukepo/49417552887.pdf
    • https://63aa7d51-6c54-48cc-ac87-b710a0da19c3.filesusr.com/ugd/c8d394_e57c53284cd34a3287c9d0df09a991e8.pdf?index=true
    • https://s3.amazonaws.com/fosagobomap/46425490036.pdf
    • http://xedavabawavela.onlinewebshop.net/target_black_friday_ad.pdf
    • https://s3.amazonaws.com/rujimidujek/duxelujaz.pdf
    • https://s3.amazonaws.com/nitatotol/72799320633.pdf
    • https://98748e4b-3258-471a-903e-8ea98415cca0.filesusr.com/ugd/fd7405_d36e5de70b47430295f40da6297cd83d.pdf?index=true
    • https://691dfa98-c543-4342-b77d-a3d7fbf094aa.filesusr.com/ugd/d55835_bc6f6d4c4e5d4c748d3454b68100668d.pdf?index=true
    • https://198ac300-f2de-41a8-aaa9-2df0d2bfefbb.filesusr.com/ugd/232b71_ce53652ab51642fdb7f4818f22f48a16.pdf?index=true
    • https://47e4df30-8702-49a4-8bd5-327e1546ff06.filesusr.com/ugd/379272_68112a620e624a4289ed310e48d9eeec.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8dc.bin
f8707e9bccaa4be4d318e9d63baadb6168121094024e081a554a4a79e82cc146		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DC 4916 bytes
font_01_sfnt_off0000e9ae.bin
8d6f3060a53b47b822dc5d275f4f6bff0388834169a549d0b9c3826617b18fa0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AE 10516 bytes
font_02_sfnt_off00010d6f.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D6F 4324 bytes

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