Malicious PDF — malware analysis report

Static analysis result for SHA-256 676347cc01d3eee0…

MALICIOUS

PDF

36.2 KB Authoring application: pstoedit
MD5: 1ff7cfcb327174021b65b8583b314b27 SHA-1: bdf3ba163ae62170bc48ab282133bcd3ce865af8 SHA-256: 676347cc01d3eee0c5a087fb30859cc5d651e2b5f8ada56729a74b886a6ddd05
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to other PDFs hosted on various domains, a technique often used for SEO manipulation or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of numerous external links suggests a redirection or content-hosting mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://johnmcnealagency.net/uploads/1/3/0/7/130739024/9892765.pdf
    • http://fr-technology.host/uploads/1/3/0/3/130323341/1734434.pdf
    • http://joemaintenance.com/uploads/1/3/0/7/130775942/xesiv.pdf
    • http://www.romillyslimes.com/uploads/1/3/0/3/130379426/wozujolilovamuni.pdf
    • http://kremalabs.com/uploads/1/3/0/4/130489001/6650682.pdf
    • http://gopml.com/uploads/1/3/0/2/130287898/925bd2d1b.pdf
    • http://cordiaaladvies.nl/uploads/1/3/0/7/130738541/4729757.pdf
    • http://mojonz.co.nz/uploads/1/3/0/7/130739684/bd81af7538fa6d5.pdf
    • http://browngreasefuel.com/uploads/1/3/0/5/130539428/79da6d90.pdf
    • http://quanscabinet.biz/uploads/1/3/0/5/130539554/ef164.pdf
    • http://akashachamberlain.com/uploads/1/3/0/5/130551585/569c1da3a61d.pdf
    • http://moniquesdreamsounds.com/uploads/1/3/0/4/130435594/kafifur.pdf
    • http://zs-development.com/uploads/1/3/0/6/130604708/af0d9.pdf
    • http://mx.s-cab.com/uploads/1/3/0/3/130323535/897234.pdf
    • http://howepropertymanagement.net/uploads/1/3/0/7/130775942/belegifafufo.pdf
    • http://vind-t.com/uploads/1/3/0/7/130740175/f09f0.pdf
    • http://namlems.org/uploads/1/3/0/5/130550967/1651692.pdf
    • http://northwestlouisianaautomationgroup.com/uploads/1/3/0/4/130436426/bubumegame.pdf
    • http://thesoonernetwork.com/uploads/1/3/0/6/130620776/130620776.html#singer+sewing+machine+bobbin+winder+parts

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002c80.bin
7da6f2fa59d2e61ccedd7c1f03f8fb4d8378cfad7cdc2a8ea49d90132a6c653d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C80 9120 bytes

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