Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3640ad6e180e4be…

MALICIOUS

PDF

78.2 KB Created: 2021-03-08 06:33:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab373266487c5cab27eb5a32c3d603d0 SHA-1: d9fa92a11e8a1e971ff2a96816e9a4c84ec44c07 SHA-256: f3640ad6e180e4be83bc674f1ffa0f4ac9d9cdf393a3dc4932dea066acb60327
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are hosted on dynamic DNS services or personal websites, suggesting a link farm or phishing operation. The primary external URI, 'https://jumiwimov.ru/strik?utm_term=where+is+the+name+lucifer+mentioned+in+the+bible', is likely a lure to direct users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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=where+is+the+name+lucifer+mentioned+in+the+bible
    • https://cdn.sqhk.co/gujowaxexag/ieggic1/carrom_3d_game_for_pc_online.pdf
    • https://jimazakogise.weebly.com/uploads/1/3/4/6/134612968/03e09ced0b13081.pdf
    • https://cdn.sqhk.co/gogojelawov/ARifhaC/orange_gamecube_controller_ebay.pdf
    • https://cdn.sqhk.co/sunomedude/jiiaiby/87660258389.pdf
    • https://zumugerajezu.weebly.com/uploads/1/3/1/1/131163828/62185fb883.pdf
    • https://bezumovepefare.weebly.com/uploads/1/3/5/3/135337037/3470222.pdf
    • http://iminn.ru/10251073627d7wx5.pdf
    • https://pusuwane.weebly.com/uploads/1/3/5/3/135346572/1493440.pdf
    • http://d-youtube.com/how_long_will_you_go_to_jail_for_going_awolnqg74.pdf
    • http://onlinetyz.xyz/wukateneduvatavorutybp60.pdf
    • https://nurosizakudagag.weebly.com/uploads/1/3/4/6/134699554/2614326.pdf
    • https://cdn.sqhk.co/nusuguponu/Xrd1aic/soccer_champions_league_tv_schedule.pdf
    • https://cdn.sqhk.co/zedawuzijis/ibObieF/how_to_draw_cartoon_eyes_female.pdf
    • https://sowimarigakuni.weebly.com/uploads/1/3/4/7/134705136/jawonube_mabugujir.pdf
    • https://cdn.sqhk.co/molavagew/hiheic9/linear_algebra_zero_vector_dimension.pdf
    • http://cooldomen.space/97668126679dnyon.pdf
    • https://cdn.sqhk.co/dufelogaruf/reHThbl/xoxuzakawagupimakorediso.pdf
    • https://cdn.sqhk.co/legesizas/eiegdgj/trivia_night_iowa_city.pdf
    • https://cdn.sqhk.co/juwafuzivega/NvihgfH/prodigy_math_game_play_free_forever.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://1350f94c-8d6f-42b4-8351-24983ad6a49a.filesusr.com/ugd/4aae87_1852242e3f1246c7a2e8fd9762721eaf.pdf?index=true
    • https://6d23287f-a15b-43b7-8d69-700c0e01f504.filesusr.com/ugd/185c00_8ad65988277543388aef15461f5f58ef.pdf?index=true
    • https://2ea9429b-0332-4ee6-bb75-ab9535b56c99.filesusr.com/ugd/e2f7e1_15275721719448ca86865ef0a66a6183.pdf?index=true
    • https://992bddda-184d-467f-a815-0165b41a2208.filesusr.com/ugd/69695d_a445a310f50f498a974900d64e7a5b59.pdf?index=true
    • https://391e4f24-9fc9-4707-ac06-338edcd9f959.filesusr.com/ugd/110ef3_dc584de9305d4eb5b12a1786161d58ac.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f02c.bin
fa3c21472f2c55596ce7858d39e9125d1399b808b741a63492efd53db8ee029b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF02C 5416 bytes
font_01_sfnt_off00010279.bin
f5a5ab0db9d6bb7a019e90b7cc5c60b6a97a6af502d635c8112e455ec7592037		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10279 11980 bytes

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