Malicious PDF — malware analysis report

Static analysis result for SHA-256 588d324c2793707e…

MALICIOUS

PDF

74.5 KB Created: 2021-06-07 07:54:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 6168e87a9219a36d476c23d3c8d48c11 SHA-1: a7274ea1ac056f81cb3aa565e7c6676e8715eaf8 SHA-256: 588d324c2793707eb2e260d5b8f5c1937e0583167059964efcea352aea0c4609
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs, one of which points to a domain associated with phishing and malware distribution ('inwebjor.ru'). The document body, though heavily obfuscated, suggests a lure related to a 'Haynes manual ford fiesta st'. The presence of numerous links and the ML classifier's high confidence score indicate a malicious intent, likely to redirect users to a compromised site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://inwebjor.ru/pbw?utm_term=haynes+manual+ford+fiesta+st PDF link annotation
    • https://zitipijasidigor.weebly.com/uploads/1/3/0/8/130874434/xosojuwewukolobaf.pdfIn PDF document text
    • https://puxidijabezidos.weebly.com/uploads/1/3/4/7/134765544/puviwenex_gupotesugura.pdfIn PDF document text
    • https://kerumeso.weebly.com/uploads/1/3/4/6/134641164/2819223.pdfIn PDF document text
    • https://jutebipofan.weebly.com/uploads/1/3/4/3/134334370/kogorobapuvovif.pdfIn PDF document text
    • https://pemimitajeli.weebly.com/uploads/1/3/0/7/130739011/3226732.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://jojekepodef.pbworks.com/w/file/fetch/144612645/vofowojoxoxiwimoruwez.pdfIn PDF document text
    • http://kufujibumufa.pbworks.com/w/file/fetch/144670323/abbyy_finereader_portable_descargar_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/263eaa52-ff43-4d2d-8cde-59eb198830a2/74021627526.pdfIn PDF document text
    • http://ravowibosu.pbworks.com/f/56245285679.pdfIn PDF document text
    • http://fulusivijomu.pbworks.com/f/33449794319.pdfIn PDF document text
    • http://barotidi.pbworks.com/f/22253664826.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3976915-faee-44dc-85c0-45750e0e7d35/17070424108.pdfIn PDF document text
    • http://bawamotijeku.pbworks.com/f/luka_chuppi_song_photo_download_mp3_bestwap.pdfIn PDF document text
    • http://nadupodifado.pbworks.com/f/drywall_cost_per_sheet_in_kingston_jamaica.pdfIn PDF document text
    • http://foxobekizax.pbworks.com/w/file/fetch/144452286/kuvozog.pdfIn PDF document text
    • http://gutopevif.pbworks.com/f/89881697873.pdfIn PDF document text
    • http://sisagexal.pbworks.com/w/file/fetch/144560805/libro_de_geografia_4_grado_de_primaria.pdfIn PDF document text
    • http://xizegopago.pbworks.com/w/file/fetch/144699813/ielts_writing_band_9_essays_dr_bruce_a_smart.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD816 4996 bytes
SHA-256: ff38233bc26d0c4d1b2c48b51ff0e4727704bc76f260990a627a28aa4c7afc15
font_01_sfnt_off0000e8f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F8 11324 bytes
SHA-256: 6b8d8c004b498a1b4cb5901cc3526d452a11705e58ad2bb71f20066fe0544fcb
font_02_sfnt_off00010ea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA6 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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