Malicious PDF — malware analysis report

Static analysis result for SHA-256 518432356f86004a…

MALICIOUS

PDF

67.5 KB Created: 2021-02-22 23:14:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: df635e6a51517cd5f945925e5d39792f SHA-1: b1ff11ea1f1149556eb507b59529de3480efb3ae SHA-256: 518432356f86004a7ff71798237440f128cb5b99709f12550bd5873a8458ed10
184 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wb?keyword=linking%20verbs%20worksheet%203rd%20grade In PDF document text
    • https://cdn-cms.f-static.net/uploads/4476281/normal_600aa719448fd.pdfIn PDF document text
    • http://goxatut.iblogger.org/pexanefajegegitasi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499622/normal_5ff543d0b6575.pdfIn PDF document text
    • https://fegajasun.weebly.com/uploads/1/3/4/5/134502742/ramixev-zutijig-jedodawixivusej-fepadinupuwere.pdfIn PDF document text
    • http://vijoxufomodazug.22web.org/request_letter_for_approval_of_uniform.pdfIn PDF document text
    • https://cdn.sqhk.co/fusaduxuw/Viggiie/46722368846.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369936/normal_6025b6329c348.pdfIn PDF document text
    • https://tiledumojamusej.weebly.com/uploads/1/3/4/0/134096308/4f5b87deff371f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466408/normal_6030acb0e37e2.pdfIn PDF document text
    • https://cdn.sqhk.co/pufuxarabo/fghghRR/feather_tattoo_with_birds_flying_away_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/mewuxedodi/iagcajg/dedenolominubud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488822/normal_600e64907bc47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467955/normal_5fd901ba29d15.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/suximawo/bawonipumosarupalusuwuti.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/29225434463.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_off0000cac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC4 5516 bytes
SHA-256: cc55fb4a507fb5ff58dc090fa3d571e150ad21c189984fb5dbc9dd43fb0edee6
font_01_sfnt_off0000dd99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD99 10364 bytes
SHA-256: 06634aabdbb74217e9bb8d4726543965ca3b47cc62b20b444cf595ac9bae6323