Malicious PDF — malware analysis report

Static analysis result for SHA-256 99f244a8d7f10aac…

MALICIOUS

PDF

72.4 KB Created: 2021-02-24 19:47:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 92f130586a10c628f51f080beda929c8 SHA-1: 1617b6b271fc03ec691a854ad5e0aa023d782a65 SHA-256: 99f244a8d7f10aac94cd7a965313ff2c8ee48810b9e826f6e57c7efcbadf067e
126 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
  • 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/award?keyword=what+does+a+red+hibiscus+symbolize PDF link annotation
    • https://cdn.sqhk.co/genopeno/idgcjgi/linesedazidimekuxuzivuga.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368979/normal_5ff9f3a2346ec.pdfIn PDF document text
    • http://denarop.22web.org/recommended_alarm_clock_app_for_android.pdfIn PDF document text
    • http://fasebumexu.iblogger.org/gujafubikovanitizelumus.pdfIn PDF document text
    • http://jisugun.iblogger.org/xanesasafifoko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421464/normal_5fdbc1df4088b.pdfIn PDF document text
    • https://cdn.sqhk.co/difigobon/hchcgex/fojakeku.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410722/normal_5fe356e716df3.pdfIn PDF document text
    • https://cdn.sqhk.co/janonaset/ji3Qha5/taronesokupapafavabinem.pdfIn PDF document text
    • http://tebefomi.22web.org/sowodamofezujevinumo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://loxexezusus.rf.gd/auto_tapper_apk_pro.pdfIn PDF document text
    • http://tujefozumuresul.epizy.com/87223127668.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/vetatuvufewerogiliwom.pdfIn PDF document text
    • http://romipozaxijida.rf.gd/70486877074.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/how_to_read_english_newspaper_for_beginners.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_off0000de9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9A 5484 bytes
SHA-256: bb4179b4744cca8226fc32d79020b9478ac8e1e35716e646ef1c4f5f15f75559
font_01_sfnt_off0000f130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF130 10208 bytes
SHA-256: fb2117e46e5ae0747947a12cc517a9e8d50b2ec7986f03bb0562b6b2108410c9