Malicious PDF — malware analysis report

Static analysis result for SHA-256 00917b1ab7c76171…

MALICIOUS

PDF

62.0 KB Created: 2021-02-15 07:02:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 016b496374c874459140e85195005390 SHA-1: 1a4ae7b6e765fad896b3838eecf6e1abd91f229e SHA-256: 00917b1ab7c7617119098955250a4b7110db7812a561321d5e679629054aa92c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates this malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, likely as a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/wb?keyword=clerking%20sheets%20for%20auctions PDF link annotation
    • https://wegenagozej.weebly.com/uploads/1/3/5/3/135394478/kipexanifemi_fupud_jijomedamaw.pdfIn PDF document text
    • http://bigchance.pw/disney_flute_solo_sheet_music58j7a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473954/normal_6008b63d72738.pdfIn PDF document text
    • http://matcobzor.ru/lagu_waktu_yang_salah_metrolagu42ws4.pdfIn PDF document text
    • http://znohist.site/76731124150vj9sf.pdfIn PDF document text
    • http://winoorama.website/pikimusiveborilepoh9615.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495257/normal_5ffca8141817a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407562/normal_601fb96f472a1.pdfIn PDF document text
    • http://creampiepow.club/kawenuxubofiwezetabuj14j.pdfIn PDF document text
    • https://lumirofelefepo.weebly.com/uploads/1/3/4/8/134892557/lifonekur.pdfIn PDF document text
    • http://ig-mediateam.net/merriam_webster_apps_freei6wm1.pdfIn PDF document text
    • http://gayerkan.com/95043095000aqjvs.pdfIn PDF document text
    • http://noncomform.space/xunurukixujitazate3apr6.pdfIn PDF document text
    • http://bitcoins-profits.com/fedesuzubuihl2v.pdfIn PDF document text
    • http://afracheat3.xyz/fitolevolenezajote6xoi0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372707/normal_601b535a2c4f8.pdfIn PDF document text
    • http://topcabinets.xyz/arteriovenous_malformation_embolizationqqinx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490523/normal_5fe26c59e5093.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_off0000b58f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB58F 5112 bytes
SHA-256: 9ec9f69e774298ba34867065892e238cb598e58cfd70abc40c7fb61aab8e6c4e
font_01_sfnt_off0000c6f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F2 10100 bytes
SHA-256: 169b6129a150dff2f395a51b515578d6ffe5e06715fd6944125b9ff0adc944d6

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