Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e3ac0ee222074c3…

MALICIOUS

PDF

96.1 KB Created: 2021-03-03 08:17:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e89834af18092d4b1a6e46d618361bee SHA-1: 31ff5ece091c70983df719465927cdee419f9271 SHA-256: 3e3ac0ee222074c368632fcd995d9623ae6909ab56597332b6a76e09d96aeeef
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://lozipotod.ru/wix?keyword=calvinism+vs.+lutheranism+vs.+catholicism PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421783/normal_601d011a60996.pdfIn PDF document text
    • https://junipupupu.weebly.com/uploads/1/3/4/7/134739756/vefag_lipusubenesujis_xemedaxu_nekumirafila.pdfIn PDF document text
    • http://lyudi23.ru/jump_jump_ball_2018_apkaifg6.pdfIn PDF document text
    • http://witikotuxigere.scienceontheweb.net/tidojuwilotagunevesujavu.pdfIn PDF document text
    • http://usesoda.pro/hossana_marcos_barrientos_acordes_guitarra6t557.pdfIn PDF document text
    • https://tupumerar.weebly.com/uploads/1/3/2/6/132695397/vogijinep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452199/normal_5ff146b450160.pdfIn PDF document text
    • http://biweekamnf.com/cateye_micro_wireless_user_manual6ndb4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392666/normal_6005e1a92735e.pdfIn PDF document text
    • http://lg-copyright.com/70103781440le5do.pdfIn PDF document text
    • http://rmk4sale.xyz/xonaludamivuwofalfl44.pdfIn PDF document text
    • https://tezilejesitox.weebly.com/uploads/1/3/1/1/131163634/bituravar.pdfIn PDF document text
    • http://beririka.scienceontheweb.net/how_many_books_of_fifty_shades_of_grey_are_there.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379602/normal_6028ba428ae8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445570/normal_60329c93ab2a9.pdfIn PDF document text
    • https://bodarisijusafu.weebly.com/uploads/1/3/5/3/135383154/004ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370778/normal_5fdb2769c527e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://letutemoxeluz.onlinewebshop.net/pagatugudelupo.pdfIn PDF document text
    • http://dapizodipe.myartsonline.com/how_to_find_common_stock_dividends_paid.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_off00013c2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C2B 5036 bytes
SHA-256: bb1d2e01132228e146ecdd514a4c70b918593745ff35fc924914c64f878cdb23
font_01_sfnt_off00014d27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D27 11196 bytes
SHA-256: dba45492bce6a8ef0de765fd746e8e17bae2646d0fc9ca37a5be499f595d1044