Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb81c0e0f36e3275…

MALICIOUS

PDF

69.3 KB Created: 2021-02-21 22:43:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 70153832cff3e94c5c79aa731523f509 SHA-1: bae07097556bafadd9068bfd488c1b606e6a9c89 SHA-256: eb81c0e0f36e3275680a958f805c438c6a74fc24885966946406d93948b364e7
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://druttle.ru/strik?utm_term=why+is+my+stihl+chainsaw+leaking+bar+oil PDF link annotation
    • http://zdorovie-vashe-vse.xyz/dell_kb216_keyboard_driver_for_windows_xpxrfxq.pdfIn PDF document text
    • https://cdn.sqhk.co/sirejeforox/bjjHhim/42477032526.pdfIn PDF document text
    • https://vizumijolotetip.weebly.com/uploads/1/3/5/3/135394273/5154586.pdfIn PDF document text
    • https://cdn.sqhk.co/jezuleku/0dEE6je/79886336556.pdfIn PDF document text
    • https://vowopazi.weebly.com/uploads/1/3/4/0/134096587/sevopi_talex.pdfIn PDF document text
    • http://erogan24.website/libros_cristianos_para_mujeres_gratisfkj7s.pdfIn PDF document text
    • https://rasajelisulozin.weebly.com/uploads/1/3/1/6/131637016/gififapenowuvi.pdfIn PDF document text
    • https://bobidowi.weebly.com/uploads/1/3/2/7/132740787/8184689.pdfIn PDF document text
    • https://funesovikigaje.weebly.com/uploads/1/3/0/7/130740183/pupanugekusenewuvar.pdfIn PDF document text
    • http://sehq.xyz/nanozejafexezisojetotig53kfn.pdfIn PDF document text
    • https://fijapirugonobi.weebly.com/uploads/1/3/4/3/134315317/muxelitat.pdfIn PDF document text
    • http://bobr.space/36380583931sutv0.pdfIn PDF document text
    • http://deutschebank-meine.com/sujiporodudutugazelfl0wz.pdfIn PDF document text
    • https://zovakilezogavi.weebly.com/uploads/1/3/1/1/131163957/8465291.pdfIn PDF document text
    • https://xonaxogurevof.weebly.com/uploads/1/3/1/4/131453171/3cb0d86c513.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d17b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD17B 5624 bytes
SHA-256: 57332dc366402c3821b415426d5ab4ac6a1f78141ac631fc99a898bc37d96bb9
font_01_sfnt_off0000e493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE493 10356 bytes
SHA-256: bdbccc61ab242e398f9055d2c7d35cab6a14d99ea2c8c518b9d1e274ee30581c