Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ae767ffda59764d…

MALICIOUS

PDF

87.1 KB Created: 2021-03-22 08:35:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 04a023d9c03a2195ffafc95255d868b6 SHA-1: 2c4b2c5d0049721d2e63f3870f880a0d331834c3 SHA-256: 8ae767ffda59764d021a87e6809ee93aeae0aafa25644ac24e5b00bbe32117db
186 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The presence of the ClamAV detection 'Pdf.Phishing.Trojan' and ML classification further supports a malicious intent. The document body's garbled text and the embedded URL 'https://jumiwimov.ru/strik?utm_term=what%2527s+the+easiest+way+to+stop+drinking' indicate a potential lure for users interested in quitting drinking, redirecting them to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=what%2527s+the+easiest+way+to+stop+drinking PDF link annotation
    • https://jokilexagazoxo.weebly.com/uploads/1/3/4/6/134602179/7487265.pdfIn PDF document text
    • http://vpntop.info/tomb_raider_2_movie_casts36c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415783/normal_5ff6aad513e42.pdfIn PDF document text
    • https://ranitezal.weebly.com/uploads/1/3/1/4/131438109/mogokijejop_newiramufimaxes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483081/normal_5fd3788487db9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379385/normal_5fde9d4634f79.pdfIn PDF document text
    • https://vufujisuwe.weebly.com/uploads/1/3/1/4/131437295/39021f2.pdfIn PDF document text
    • http://kujinatazema.sportsontheweb.net/american_history_textbook_college.pdfIn PDF document text
    • https://rosanibo.weebly.com/uploads/1/3/4/8/134873488/gegidiki-sunujalexo-xudogotamol-jamezovojarovo.pdfIn PDF document text
    • http://ch-bewertung-2888.xyz/280654920699k24p.pdfIn PDF document text
    • https://pusobufuronuwu.weebly.com/uploads/1/3/4/4/134475569/6185737.pdfIn PDF document text
    • http://zdorovie-vashe-vse.xyz/comptia_network_n10-_006_dumps7x0rv.pdfIn PDF document text
    • https://xoputiwi.weebly.com/uploads/1/3/1/4/131438532/ca2d0.pdfIn PDF document text
    • https://kavavori.weebly.com/uploads/1/3/4/0/134012315/47f84.pdfIn PDF document text
    • https://geredape.weebly.com/uploads/1/3/4/3/134349068/5359893.pdfIn PDF document text
    • https://wesaxewotivaf.weebly.com/uploads/1/3/4/5/134578523/f3d013b3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373526/normal_6021ed51dde71.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xizokenimufewom.atwebpages.com/rain_bird_5000_mpr_nozzle_chart.pdfIn PDF document text
    • https://5b3fc17b-a4fb-4144-9a53-ff617e35bc6a.filesusr.com/ugd/696117_e8e27e0ead66494db4616c249b4ac57b.pdf?index=trueIn PDF document text
    • https://db532842-334f-4efb-8993-e67ec8f20ff5.filesusr.com/ugd/bc5be3_9837196f13ed4dd3aa0059724d6c3b57.pdf?index=trueIn PDF document text
    • https://9a4b5e96-23fe-4021-9525-787506808755.filesusr.com/ugd/b3318b_9c1d8cc314d94181bd98cdaf820c7707.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FF 5280 bytes
SHA-256: cff86fdf0bbc6b9090581683f73c3a58011dca4635dc1173bb209ca323ff3f97
font_01_sfnt_off00010413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10413 11228 bytes
SHA-256: 7905186cd28794a4ce5311709cbe982aaa8466cf9da5079191e927d52fab68c8
font_02_sfnt_off00012a3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A3B 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90
font_03_sfnt_off00013ed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ED2 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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