Malicious PDF — malware analysis report

Static analysis result for SHA-256 59b7c58b0917a297…

MALICIOUS

PDF

79.2 KB Created: 2021-03-21 03:42:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62976ce6453733e9041e5514e7590d11 SHA-1: 786c8f7bce76bbb94798032e56c9d5f7345de48a SHA-256: 59b7c58b0917a297abad380425d73b3c801bf113cd9661084aba74e063e8fff5
156 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a large number of external links, with one prominent URL pointing to 'bologen.ru'. This, combined with the ClamAV detection and ML classification, strongly suggests malicious intent. The document body, though heavily obfuscated, appears to reference a movie soundtrack, likely a lure to disguise the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://bologen.ru/strik?utm_term=mortal+instruments+movie+soundtrack
    • http://palikexifumalam.mywebcommunity.org/darajerozab.pdf
    • https://vanizubifimid.weebly.com/uploads/1/3/0/8/130874516/lawawunijopu-towitamojurivon-saviton.pdf
    • https://lobobofu.weebly.com/uploads/1/3/4/6/134680821/dogejoribewozojeke.pdf
    • http://fadewujetenuve.mywebcommunity.org/personal_finance_goal_setting_worksheet.pdf
    • https://jodegometokak.weebly.com/uploads/1/3/1/6/131606115/kesege.pdf
    • https://xavodujur.weebly.com/uploads/1/3/5/9/135972692/wodas-piwax-gasuvef-mifiwulobirix.pdf
    • https://ravixibede.weebly.com/uploads/1/3/4/5/134584659/remarosugenokajixur.pdf
    • https://nawuwisenaz.weebly.com/uploads/1/3/5/3/135318134/tobazawexarumidib.pdf
    • https://finirawex.weebly.com/uploads/1/3/2/7/132741073/zufokugiwezoviw_logad_fedoselu.pdf
    • https://taxajefikudo.weebly.com/uploads/1/3/4/7/134765143/4298516.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kovozenamofox/84036832248.pdf
    • https://s3.amazonaws.com/kefiperizonofu/honeywell_pro_4000_user_manual.pdf
    • https://d4f4546a-a836-4b3d-8651-c56b89608eca.filesusr.com/ugd/3e9e83_a7f10f52fb5440a7b072f3f9800b08f1.pdf?index=true
    • https://cc968bdf-8a18-4a65-a72d-893c706ef441.filesusr.com/ugd/bae363_170f086401d9435292553df435daccb3.pdf?index=true
    • https://b0c090b1-cb02-46d8-8a69-3fb9d82636b6.filesusr.com/ugd/4dbf3f_e279f5a1a9d543b1abae2dae73dd6a2a.pdf?index=true
    • http://ranitirunom.myartsonline.com/el_mundo_magico_de_terabithia_pelicula_completa_online.pdf
    • https://s3.amazonaws.com/wixanarer/xaxosipikelujegukubuwu.pdf
    • https://s3.amazonaws.com/xutomoxu/38645545408.pdf
    • https://76df98a8-3e94-4eee-a6f5-23e1de06049b.filesusr.com/ugd/54c74c_5c6ba8010dcf412189397bdac46ce28e.pdf?index=true
    • https://s3.amazonaws.com/xisakazelelinim/kuvabebubofiwav.pdf
    • https://s3.amazonaws.com/tubukeganuji/small_engine_repair_lincoln_nebraska.pdf
    • https://s3.amazonaws.com/xepululejiwof/58982372193.pdf
    • https://73a1781f-5c9f-4c76-8a11-a8e8c44f336a.filesusr.com/ugd/d9f7b5_8c9fffd1aa2f4168803059ab780d37d8.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_off0000f7a5.bin
dab31f4259a02cf56dd0052d6415249c55b840208a2c0fc62aadaffb5178270a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A5 5212 bytes
font_01_sfnt_off0001095b.bin
9fb36a7f6109503e8df47a6d27a33d6b3753c7ab5a0a4986e0aaea71cf4b9f16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1095B 11176 bytes

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