Malicious PDF — malware analysis report

Static analysis result for SHA-256 324540a3c91597d3…

MALICIOUS

PDF

37.9 KB Authoring application: PDFedit
MD5: d378cb4430e8de497432ef0bd5c18f5d SHA-1: c00ab7c85e742611930774f863827d2ba0766d83 SHA-256: 324540a3c91597d3c4feae15a4df853cd64a2d6c5e690e5305ede250793a00a7
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links to external PDF files, a technique commonly used for SEO poisoning or to redirect users to malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. No scripts were extracted, but the primary attack pattern involves directing users to a network of suspicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://fabricoftheearth.com/uploads/1/3/0/3/130313299/pejotoxexorotizix.pdf
    • http://elaineyuki.com/uploads/1/3/0/5/130551366/bc49ceefa5.pdf
    • http://palatka.space/uploads/1/3/0/2/130271195/zufogavodeko-wobemegesu-poveduvipupepad.pdf
    • http://huskercarwash.com/uploads/1/3/0/6/130604424/d7282c8676a9a.pdf
    • http://caitlinmorrison.com/uploads/1/3/0/6/130604093/wadegajowurab_wazovitovafag.pdf
    • http://www.solfege101.com/uploads/1/3/0/6/130639547/xogozutuzelamim-besuxiwexikaraj.pdf
    • http://rootsandradicles.com/uploads/1/3/0/6/130640102/wadofugumi-wagator.pdf
    • http://www.ishwrimusicclasses.com/uploads/1/3/0/8/130873709/nowajoxuf.pdf
    • http://schmittwoodworkingllc.com/uploads/1/3/0/7/130739401/wesiwewozupe_lepegibivazogu.pdf
    • http://realestatecareerjacksonvillenc.com/uploads/1/3/0/5/130588857/3567663.pdf
    • http://scribnerportraits.com/uploads/1/3/0/7/130739891/3223553.pdf
    • http://webmail.ginadianneharding.com/uploads/1/3/0/7/130739000/6754776.pdf
    • http://www.shreddingmammoth.com/uploads/1/3/0/7/130776416/1013121.pdf
    • http://thebestmanyoucanbe.com/uploads/1/3/0/4/130436483/130436483.html#when+is+viral+pink+eye+not+contagious+anymore

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003a91.bin
60692cc329b29650841dc960bdb5c68d8737fcdc16418d0c8f1e997934e88943		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3A91 8040 bytes

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