Malicious PDF — malware analysis report

Static analysis result for SHA-256 112dd5901192d783…

MALICIOUS

PDF

41.8 KB Authoring application: Nitro PDF
MD5: 53f3fac2d64bef56a509d9172c30b35b SHA-1: cf6e471787e8a7acb40b38e255311b0a0efb62af SHA-256: 112dd5901192d783f8ab1c193e8431bc6fe8333fc8c6e4803bc284c2f5dfb42e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links to external PDF files, a technique commonly used in SEO poisoning or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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 http://nevittlawoffice.com/uploads/1/3/0/5/130551197/kovuxa.pdf
    • http://alkuksa.com/uploads/1/3/0/4/130488417/fuxodok_bakufipimiwine.pdf
    • http://frontlineplusfordog.com/uploads/1/3/0/3/130323400/087af05.pdf
    • http://barclaysme.com/uploads/1/3/0/4/130489080/pelefudibu_xexasidinined.pdf
    • http://narvaezabogados.com/uploads/1/3/0/6/130604850/78579.pdf
    • http://fivipaki.private-girls.club/uploads/2020/01/29/af6f474.pdf
    • http://actwithpurpose.ca/uploads/1/3/0/4/130475989/xebewizawa-susuruvekevujan-woruxesorilap-tanawo.pdf
    • http://screenlo.com/uploads/1/3/0/2/130272937/kejuwadexora.pdf
    • http://ncexchangeclub.com/uploads/1/3/0/4/130483673/03dcc6970ae4d6.pdf
    • http://mountainafrica.co.za/uploads/1/3/0/6/130604769/dejuzobedolemeri.pdf
    • http://drrosechildcentredcounselling.com/uploads/1/3/0/5/130543346/xavebukufijog_panonefemisobof.pdf
    • http://partnersinrelief.com/uploads/1/3/0/5/130588565/130588565.html#national+schools+press+conference+2015

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001366.bin
d14758b9cd7b2ccdf08cc76b79973945b89562535b78edc79759058b982d60c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1366 8780 bytes

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