Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9b6416ee6f7ad8f…

MALICIOUS

PDF

81.0 KB Created: 2021-03-16 18:41:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: bd60b48e8d70a2bf031e7706e72703b2 SHA-1: 2ce5696747f73fedcef243077b8b9065d9c5df41 SHA-256: e9b6416ee6f7ad8f3488e15436be3feeb15dab11317f1eb4daaebdd711be1706
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous external links, with the primary lure being "how to lose weight on vegan diet". The embedded links point to disposable hosting and are designed to redirect users, likely to a second-stage payload or phishing site.

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://baarspo.ru/strik?utm_term=how+to+lose+weight+on+vegan+diet PDF link annotation
    • https://renobikedasel.weebly.com/uploads/1/3/4/8/134897329/4666905.pdfIn PDF document text
    • http://pasikufopubiwo.mypressonline.com/20201926181.pdfIn PDF document text
    • http://lupazul.mywebcommunity.org/gadove.pdfIn PDF document text
    • https://kekisadubivef.weebly.com/uploads/1/3/3/9/133986731/9af7021383cb9.pdfIn PDF document text
    • https://fuketuxe.weebly.com/uploads/1/3/4/4/134495293/dobituxupej.pdfIn PDF document text
    • http://sport-stavki.fun/malidivvdm.pdfIn PDF document text
    • https://buliduxefexefux.weebly.com/uploads/1/3/1/6/131636978/b64e673.pdfIn PDF document text
    • https://kilewesiviteki.weebly.com/uploads/1/3/1/1/131163613/0387b8c385cce54.pdfIn PDF document text
    • http://bukuminuwakub.mypressonline.com/annotate_free_ios.pdfIn PDF document text
    • http://premial.su/10091235108be95r.pdfIn PDF document text
    • http://netewe8.xyz/islands_fine_burgers_menu_pricesk143d.pdfIn PDF document text
    • http://goduvide.22web.org/aoac_methods_of_proximate_analysis.pdfIn PDF document text
    • http://tonagruz.ru/compaq_presario_cq57tu7c3.pdfIn PDF document text
    • http://sowoxapexemex.sportsontheweb.net/fukesapawesasevisu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xezujuwevan.epizy.com/97380087396.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/029ee9d2-d14e-4e99-91a8-f1015f40788e/naweferumagawilo.pdfIn PDF document text
    • http://divamepirinati.rf.gd/how_to_attach_reloading_press.pdfIn PDF document text
    • https://0c7ecde5-8d52-4b6d-bf00-bcb9beb5fd3c.filesusr.com/ugd/b6f5a5_a106845580c24be0af1f8579e3152698.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d69fbf73-aa68-47d3-9974-ee448eaa661d/99162898950.pdfIn PDF document text
    • http://nubirenewukuz.rf.gd/58903616519.pdfIn PDF document text
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_5eae72a824f34a36803c9b309bdfdba9.pdf?index=trueIn PDF document text
    • https://36fc1fe3-b646-4cc1-b6e9-de51469aea27.filesusr.com/ugd/3eb4bd_117f2537dba941adabffa390b5de22a5.pdf?index=trueIn PDF document text
    • https://5ccda086-29c7-4024-8a93-689df1f3b89c.filesusr.com/ugd/ed8107_5e6a25dd6a2440bc8bd59a1301d0e205.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE6 5104 bytes
SHA-256: 3cd5c18db93889eb09d276c1f2ab87c8f97dfa7e3683670f4803e877f94e6105
font_01_sfnt_off00011156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11156 10936 bytes
SHA-256: 2fb243a5025c99f58d621c902f93d06e3c82caa36ba574ed4dcbbfe47aaaad91