Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0445b036d0b8ffe…

MALICIOUS

PDF

80.6 KB Created: 2021-03-23 16:39:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 5c73f7faf1a55a1eb893e54b16ec904e SHA-1: 20b9b8f33e84fa43defc51f1d6a8c584c4c60563 SHA-256: d0445b036d0b8ffe883cfff2a0367b55efcbde8e381a7bce6c9f4eab42689284
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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=dbx+286s+and+cloudlifter PDF link annotation
    • http://reestr.site/giwuraxurekigiviximufizalihfxr.pdfIn PDF document text
    • https://cdn.sqhk.co/guranotup/cohblib/851636436.pdfIn PDF document text
    • http://xatakafigudu.getenjoyment.net/marguerite_duras_hiroshima_mon_amour.pdfIn PDF document text
    • https://cdn.sqhk.co/talokelom/hj3icjb/cute_cats_talking_gif.pdfIn PDF document text
    • http://idealslimitaly-ufficiale.site/el_ropavejero_cri_cri_letra6e3vb.pdfIn PDF document text
    • https://cdn.sqhk.co/riwaxagi/icjxMSh/wallpaper_drag_bike_hd_download.pdfIn PDF document text
    • https://cdn.sqhk.co/mogowepuw/erhcheX/zx_house_attack.pdfIn PDF document text
    • https://cdn.sqhk.co/vomemubevu/gdiarJR/89801264223.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/j7FEJhh/bitdefender_mobile_security_antivirus_pro_apk.pdfIn PDF document text
    • http://healthit.space/tutoriel_arduino_uno_francais2wsq5.pdfIn PDF document text
    • https://cdn.sqhk.co/jarixizotib/fkjj9hj/81416626767.pdfIn PDF document text
    • http://vuvulusigi.scienceontheweb.net/kinowuselufobalumanugiwe.pdfIn PDF document text
    • https://cdn.sqhk.co/jejekije/bdLCFeI/46613436259.pdfIn PDF document text
    • http://nawitebexu.medianewsonline.com/31385847891.pdfIn PDF document text
    • https://cdn.sqhk.co/xanodujijefu/aJVigjj/78460161029.pdfIn PDF document text
    • https://cdn.sqhk.co/basinasedu/mNihZI5/repugugubujezokogazomo.pdfIn PDF document text
    • https://cdn.sqhk.co/rolileduvof/auLjggg/25178363950.pdfIn PDF document text
    • https://cdn.sqhk.co/pizokifuxe/ibhasia/exploration_definition_in_science.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
    • https://8dcf3d85-40eb-4350-b789-ae6ac2c46e24.filesusr.com/ugd/21d17a_9ccc6b8c9cda4fc1b732770c3338ea43.pdf?index=trueIn PDF document text
    • https://4d3f6715-1114-433d-a4b7-45a5e22e3858.filesusr.com/ugd/ce86b4_c89d09c25a134f7da798119d5a4bb2f1.pdf?index=trueIn PDF document text
    • http://ziwemasux.myartsonline.com/tudunuvuwatoretalirujibud.pdfIn PDF document text
    • http://wowutuzineko.myartsonline.com/58113523410.pdfIn PDF document text
    • https://f6180879-d31b-499c-8e42-fead7842c491.filesusr.com/ugd/007227_4235ba7617b74882a7549cf876829e7a.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f12e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12E 5584 bytes
SHA-256: 2c3d6b6e3dc76487f7312e5091908668a5173e2581f0bc238dabc2950af1094f
font_01_sfnt_off00010429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10429 10256 bytes
SHA-256: bcd58eb34f25267f43c3d749a6da1d34a2b56a2d0db357f3d216c1e2bea75f36
font_02_sfnt_off000126ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126EE 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3