Malicious PDF — malware analysis report

Static analysis result for SHA-256 74438b1d154d689c…

MALICIOUS

PDF

34.5 KB Authoring application: LibreOffice
MD5: 3f11dc319f5a0f160872f1914d4df8d2 SHA-1: ab71f0bff735aa49ea6cb9530ac035645d901f8d SHA-256: 74438b1d154d689c6110848c5b3017e334f6f5545a349ffe943552269c6a4238
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, presented as a free converter tool. This technique is commonly used to redirect users to malicious sites or to download further malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

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://chestercustombuilders.ca/uploads/1/3/0/4/130483926/guwofe.pdf
    • http://bitapourtavoosi.com/uploads/1/3/0/5/130543054/8742580.pdf
    • http://mail.andrewscole.com/uploads/1/3/0/8/130813898/b87fd91.pdf
    • http://mrramsay.co.uk/uploads/1/3/0/6/130620427/foxemegitoxejigab.pdf
    • http://bbpapaveri-e-papere.com/uploads/1/3/0/7/130739475/11e7ce77.pdf
    • http://webdesignbycarole.com/uploads/1/3/0/4/130483583/211366.pdf
    • http://neasoto.com/uploads/1/3/0/6/130640079/7c8177bcad467c2.pdf
    • http://mschris.net/uploads/1/3/0/8/130814859/6a07823c201a.pdf
    • http://capstonegroup.net.au/uploads/1/3/0/7/130740045/2561208.pdf
    • http://littlehimsandhers.com/uploads/1/3/0/2/130287211/komomazijo.pdf
    • http://www.lushgardenhotels.com/uploads/1/3/0/7/130775504/ea6b75e.pdf
    • http://beseecherllc.com/uploads/1/3/0/4/130483753/bematiler-zozazupa.pdf
    • http://www.paiperformance.com/uploads/1/3/0/5/130551534/4f87266baa15aa.pdf
    • http://tunedinteacher.com/uploads/1/3/0/6/130639428/3133856.pdf
    • http://www.nautanotherbakingblog.com/uploads/1/3/0/7/130776503/kanijajator-zixened.pdf
    • http://abcofxxx.com/uploads/1/3/0/5/130551607/187c37a0.pdf
    • http://nwm2020.club/uploads/1/3/0/6/130620233/418a22b88f.pdf
    • http://idents.net/uploads/1/3/0/2/130272592/vopokefa.pdf
    • http://mytryshyn.com/uploads/1/3/0/4/130483795/e33712d4f.pdf
    • http://tjscatering44.com/uploads/1/3/0/2/130271099/5fd766ff8492d.pdf
    • http://markanthony.us/uploads/1/3/0/6/130620459/palejiko-jojazirabu-makezar-vomorelom.pdf
    • http://digitalmei.com/uploads/1/3/0/3/130323962/xazul.pdf
    • http://www.rachelsiemens.com/uploads/1/3/0/9/130969137/zenel.pdf
    • http://dcflooring.net/uploads/1/3/0/5/130551694/498522895.pdf
    • http://cmenclosures.com/uploads/1/3/0/9/130969772/7006876.pdf
    • http://theplainshotel.devsite-1.com/uploads/1/3/0/6/130622024/130622024.html#ms+word+to+adobe+pdf+converter+free+download

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002442.bin
73fa23bf0873f35a7dc6ea4146a791441699bf648ea18ae0cfe93c168abdfad2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2442 7320 bytes

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