Malicious PDF — malware analysis report

Static analysis result for SHA-256 109e37436c995b24…

MALICIOUS

PDF

77.0 KB Created: 2021-04-03 07:25:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 68e6e17f4d6b1b3221b3f54d1e09b287 SHA-1: c5342dd47fcd7c0fdb396924631bb1087ec12e0a SHA-256: 109e37436c995b24bafb88c631f10951591e95dde82489f8e520bf37ee683315
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm used for SEO manipulation or to distribute further payloads. The primary external URL observed is https://botokaw.ru/strik?utm_term=master+forge+grill+model+l3218-1, which is likely the intended destination for users clicking on links within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://botokaw.ru/strik?utm_term=master+forge+grill+model+l3218-1 PDF link annotation
    • https://muwirejevom.weebly.com/uploads/1/3/1/8/131857435/buzewuzuve.pdfIn PDF document text
    • https://kujazekomoduni.weebly.com/uploads/1/3/5/3/135315250/6361870.pdfIn PDF document text
    • https://gorejirulikem.weebly.com/uploads/1/3/4/7/134738880/pategujapomabig_wataxutima_mufaloworunagar_wesuf.pdfIn PDF document text
    • https://dibotora.weebly.com/uploads/1/3/4/8/134870334/supinok_kikezuzopesej_jipisonivuw_bowuxidilavan.pdfIn PDF document text
    • https://cdn.sqhk.co/remimidotomi/4UAieWT/best_adhesive_for_metal_to_sheetrock.pdfIn PDF document text
    • https://ripukalogud.weebly.com/uploads/1/3/4/3/134391837/ronifekifez.pdfIn PDF document text
    • http://pakawuwujawo.getenjoyment.net/59400579519.pdfIn PDF document text
    • https://letunaxure.weebly.com/uploads/1/3/1/3/131383761/9c3adf3c2.pdfIn PDF document text
    • http://dodemul.mygamesonline.org/dovovikikidiresirizo.pdfIn PDF document text
    • https://sikenobavusemel.weebly.com/uploads/1/3/2/6/132682861/fiwagut-zemukovamezoz-banuw-zotola.pdfIn PDF document text
    • https://cdn.sqhk.co/jafipago/gejbCid/84859582383.pdfIn PDF document text
    • https://cdn.sqhk.co/xidujefonari/hichfaO/75556122369.pdfIn PDF document text
    • http://jakiduve.scienceontheweb.net/19468568442.pdfIn PDF document text
    • https://gokixojegesefa.weebly.com/uploads/1/3/4/8/134864476/suminugafim_migulimozajotov.pdfIn PDF document text
    • https://tedipoji.weebly.com/uploads/1/3/1/4/131408178/mufatofonij-romedazi-milogekavafu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/mozilla_browser_windows_10.pdfIn PDF document text
    • http://tivakifuzir.atwebpages.com/how_do_you_reset_the_service_engine_soon_light_on_a_2004_buick_century.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/cambridge_young_learners_english_starters_free.pdfIn 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_off0000ea01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA01 5804 bytes
SHA-256: 72d23249bbbb76e045f88027b58529564f3ed7f8488393520d95d30b35ce85a1
font_01_sfnt_off0000fdc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC2 11580 bytes
SHA-256: 265ed336624fdc91c902b35b14ce3f81d633645bab06ea0043875905a3a07b15