Malicious PDF — malware analysis report

Static analysis result for SHA-256 8193f12cd0204396…

MALICIOUS

PDF

81.3 KB Created: 2021-04-19 23:07:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f31ebbbd2de2ba5f50006f9b6c61ccb5 SHA-1: 265470c53bd6001be7b531d703bd7a1acb29745e SHA-256: 8193f12cd0204396eac9b2031f42c6d7e328e6fc282756096e76b51f80e2123c
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are obfuscated or lead to suspicious domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs are likely used to redirect the user to a phishing page or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jumiwimov.ru/strik?utm_term=mr+coffee+iced+coffee+maker+single+serve+walmart
    • https://cdn.sqhk.co/manizamo/iUiaRhc/71988070995.pdf
    • https://cdn.sqhk.co/mezadisedud/nhhegjM/beyblade_burst_rivals_game_online_play.pdf
    • http://supermagazforsale1.xyz/jivejiifonc.pdf
    • https://cdn.sqhk.co/titesojijuko/iiilUtm/fegivex.pdf
    • https://cdn.sqhk.co/gakilofod/edXgWij/pilot_jobs_california.pdf
    • https://cdn.sqhk.co/nagebagem/OPBvIgj/radical_dreamers_definition.pdf
    • https://cdn.sqhk.co/numokafas/jamJiib/xafopavuvinapifotari.pdf
    • http://drovazvenigorod.ru/weber_spirit_e-210_measurements6lbvu.pdf
    • https://cdn.sqhk.co/ravawiku/Dijtdid/zefoge.pdf
    • https://cdn.sqhk.co/duzoxibuf/jjxij1s/cool_black_live_wallpaper_for_android.pdf
    • http://itfamily.info/video_player_for_mac_os_x_10._6081kv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://6131fb9f-3080-406c-a6ab-c4686b6a2f6f.filesusr.com/ugd/52be6f_1dc54d40011c48ca9301b132b33b8864.pdf?index=true
    • https://s3.amazonaws.com/fajeloninesitel/verudusazabo.pdf
    • https://6a421494-2577-4416-904f-e17348f56b63.filesusr.com/ugd/85e76a_71602ab48d854841b5c29505eebf6a32.pdf?index=true
    • https://s3.amazonaws.com/mojivikapeti/come_dine_with_me_episode_guide.pdf
    • https://6a1e2a5f-c456-4288-b9d5-5378f87870fb.filesusr.com/ugd/076fac_6f7eff69eb714a1287190001eb8b533e.pdf?index=true
    • https://s3.amazonaws.com/dipafuxe/iicsa_nottingham_report.pdf
    • https://5849b288-062f-49f8-a71b-da420f1f00fd.filesusr.com/ugd/c068f8_c837b6aa092744a0853d7cbe4fa28ecf.pdf?index=true
    • https://3a0d5408-2ea1-4258-8d29-5d96341cad2c.filesusr.com/ugd/79cb75_18ba115c294a4b57a79f02c124a48467.pdf?index=true
    • https://883cd1dc-02d0-4059-8fa2-99201f92b631.filesusr.com/ugd/6166c9_f5b853a2fe804e5bb1961d4ee84bfbfd.pdf?index=true
    • https://s3.amazonaws.com/simujix/85361216461.pdf
    • https://bed1e925-73f7-457c-87ff-53f226988024.filesusr.com/ugd/d4a8ce_9e29afa3ee3842db9b2bd7c7050bc43c.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_off0000f38f.bin
64bc5c9a64d3abcdff2d2be2f7988cbcbee337b8a569796e6026e39e5977c94e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF38F 5352 bytes
font_01_sfnt_off000105c0.bin
1c85958027575c5651cd349b00ed37fa1da1473f84ec67389ae4bb0c2fc11390		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105C0 10452 bytes
font_02_sfnt_off000129a0.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129A0 4324 bytes

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