Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f8b199168360f6a…

MALICIOUS

PDF

38.9 KB Authoring application: PDF Studio
MD5: e4c2883baf7cdefa7d793cf1692cc723 SHA-1: 4f84284fdfd11dd9661730af856c946c286488e8 SHA-256: 2f8b199168360f6a27fa4a1d19219b703a73273a606f12abdb62a5e4d139be76
152 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 often used for SEO manipulation or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies the mass external link farm, with the dominant host being practicalstartupbook.net. The embedded URLs are likely part of a phishing or content distribution scheme.

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://practicalstartupbook.net/uploads/1/3/0/7/130775001/5163047.pdf
    • http://designinhours.com/uploads/1/3/0/7/130775191/fomevipokusa.pdf
    • http://gmgranada.com/uploads/1/3/0/6/130621342/661780.pdf
    • http://acot.website/uploads/1/3/0/6/130620574/78d0ed5405.pdf
    • http://alswoodworkingtools.com/uploads/1/3/0/7/130775643/3312143.pdf
    • http://www.carouselmusictheatre.org/uploads/1/3/0/2/130272232/1eda89bc3.pdf
    • http://cpanel.elleextensioncils.com/uploads/1/3/0/8/130874435/996850.pdf
    • http://ndmbfc.com/uploads/1/3/0/2/130291908/nukajiwag_lafejevevovu_logolomopo.pdf
    • http://livelushly.com/uploads/1/3/0/5/130588159/famemusov.pdf
    • http://mjbjacobs.com/uploads/1/3/0/6/130640006/ab8a38b8.pdf
    • http://epicure-events-and-design.com/uploads/1/3/0/6/130603740/9116f57402.pdf
    • http://bubbleandmimiltd.com/uploads/1/3/0/2/130270872/7203071.pdf
    • http://www.aaroncharlesg.com/uploads/1/3/0/8/130874043/xotezipalo-velogafek.pdf
    • http://myshecollectiononline.com/uploads/1/3/0/4/130476004/xevubaze_jomelu_zisoxapexu_zowezekodido.pdf
    • http://hispanicaccessfoundation.com/uploads/1/3/0/3/130323412/5c7a8f1a359.pdf
    • http://go.lsbrpc.net/uploads/1/3/0/6/130604046/kulibatugo.pdf
    • http://ungranitodearena.net/uploads/1/3/0/3/130313746/0c7bc286a33e.pdf
    • http://hollyellisonmiller.com/uploads/1/3/0/2/130289530/4968082.pdf
    • http://lacrossewheel.com/uploads/1/3/0/3/130379581/nijuzonomaguz.pdf
    • http://magicaladventurestravelbystacy.com/uploads/1/3/0/4/130483728/3499606.pdf
    • http://mail.yogaaah.com/uploads/1/3/0/4/130475990/10f6cc1f.pdf
    • http://nolimitationsyouthservices.org/uploads/1/3/0/6/130604222/dafodeka_tunugerovetevun_dubarogo_jatapixib.pdf
    • http://spotfuse.net/uploads/1/3/0/4/130436154/f30465.pdf
    • http://kishwaleather.com/uploads/1/3/0/2/130288394/200906.pdf
    • http://www.claytongatemassagetherapy.ca/uploads/1/3/0/4/130488198/130488198.html#u+adjectives+to+describe+a+person+positive
    • http://myshecollectiononline.com/uploads/1/3/0/4/13047

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003457.bin
c6bf73727bc4da73f75c9805c50f33dbb0d86e53339e9534c1107410cbff1eba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3457 7932 bytes

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