Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbd45d40cce0373d…

MALICIOUS

PDF

67.4 KB Created: 2021-02-10 18:31:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: d15a999426128b732010dc019522051f SHA-1: 92cad693930f9a9a3564dd81f7cdbc0ead68d519 SHA-256: bbd45d40cce0373d4ae20092d465727ef4ea5dd622a16a3db96039a7adbcbf1d
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing operation. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs, such as 'https://leonvi.ru/aws?utm_term=video+converter+full+hd+1080p', are likely used to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/aws?utm_term=video+converter+full+hd+1080p PDF link annotation
    • https://tabupuja.weebly.com/uploads/1/3/4/6/134647436/didalil.pdfIn PDF document text
    • https://sadepejeriroxet.weebly.com/uploads/1/3/5/3/135337628/zilozujakimoti.pdfIn PDF document text
    • https://vejikawotepux.weebly.com/uploads/1/3/4/8/134887167/286c2ef1d.pdfIn PDF document text
    • https://lowunidedalovel.weebly.com/uploads/1/3/1/3/131380213/7037729.pdfIn PDF document text
    • https://fosovumukudire.weebly.com/uploads/1/3/4/2/134235423/suberamo.pdfIn PDF document text
    • https://kiriwalukejogof.weebly.com/uploads/1/3/4/3/134310578/6d56fbb.pdfIn PDF document text
    • http://jojonavakuxuf.iblogger.org/bloodborne_chalice_dungeon_boss_guide.pdfIn PDF document text
    • http://babudategajuzul.iblogger.org/informacion_sobre_carpincho_uruguay.pdfIn PDF document text
    • https://fetezubusob.weebly.com/uploads/1/3/2/6/132681625/tomagilaxurinak-bavered-zazozowizu.pdfIn PDF document text
    • http://petonopelun.iblogger.org/velifuraget.pdfIn PDF document text
    • http://palifagumelu.22web.org/31717955886.pdfIn PDF document text
    • http://vobemosezo.22web.org/bargain_for_information_nms.pdfIn PDF document text
    • https://gumabudisipinef.weebly.com/uploads/1/3/2/7/132712006/62a305.pdfIn PDF document text
    • https://fifikasato.weebly.com/uploads/1/3/1/4/131437502/gimumowovo_lirimizozo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feruzituxiruz.rf.gd/wikeruwezida.pdfIn PDF document text
    • http://basefub.epizy.com/beparoluxi.pdfIn PDF document text
    • http://titegerekarirov.rf.gd/ammonium_nitrate_msds_sheet.pdfIn PDF document text
    • http://kenavegolixase.epizy.com/maserati_car_hd_wallpaper.pdfIn PDF document text
    • http://kixixiwibatogit.epizy.com/diana_guide_jg.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_off0000cc6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC6F 5268 bytes
SHA-256: faaed85c8c30332d5e10d745ccad8bdbe0261206e1973f5039c4cd0d853a9095
font_01_sfnt_off0000de69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE69 9920 bytes
SHA-256: 643cefdec6d92ebf31508ce16003c96e6c98642ce0b652e70b1f416bcdde66f7

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