Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fa1228a9a9ce2e1…

MALICIOUS

PDF

72.7 KB Created: 2021-03-03 15:41:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 6ebd3b9463cfe46d8122b3c0b2c3c706 SHA-1: 0fd8e2ecd10991822a44cfeb17f47bb97fbf7e60 SHA-256: 4fa1228a9a9ce2e1e35385f904bed17198ed67da521796074b093868df93c14e
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/award?keyword=motu+ultralite+mk3+hybrid+review PDF link annotation
    • https://losebevaxefot.weebly.com/uploads/1/3/5/3/135347065/4933992.pdfIn PDF document text
    • https://cdn.sqhk.co/fupupusamun/icFjbZl/85766805812.pdfIn PDF document text
    • https://cdn.sqhk.co/sibamoxa/jgYcbic/17294632296.pdfIn PDF document text
    • https://cdn.sqhk.co/vinogusi/Bhajfii/pitbull_dog_attack_human.pdfIn PDF document text
    • https://mevepabazeme.weebly.com/uploads/1/3/4/0/134013418/114082.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366312/normal_60143c767561a.pdfIn PDF document text
    • https://cdn.sqhk.co/sunidoxil/hbifgjK/sotekanibaw.pdfIn PDF document text
    • https://jumosoguwakebak.weebly.com/uploads/1/3/4/5/134588816/9101061.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376354/normal_5fd77f8daa842.pdfIn PDF document text
    • https://cdn.sqhk.co/mugetawelumi/cVgdghC/dixomujipinanekir.pdfIn PDF document text
    • https://pevusipifo.weebly.com/uploads/1/3/4/8/134863194/toxixinosipoxuvod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464720/normal_60286670d4997.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481988/normal_5ffb0e6ca3a88.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tujefuguxofela.rf.gd/what_is_the_theme_in_oedipus_the_king.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_off0000dfc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC4 5516 bytes
SHA-256: f2f67ff5a7fbf9670c5e9039e73aab6a2dd23bd73b8413d011b2658d7ebddff6
font_01_sfnt_off0000f276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF276 10392 bytes
SHA-256: bf87223a835200b910a0d091b7b9f364a3b689ee8c9045fb8c39ad485eeeeaa0