Malicious PDF — malware analysis report

Static analysis result for SHA-256 657dad3c82fb29c6…

MALICIOUS

PDF

37.8 KB Authoring application: Nitro PDF
MD5: 6c10f6195be5676789f5ef6c422b49df SHA-1: dad8c0388b2ea4ada67b792895c7e467c5934ac4 SHA-256: 657dad3c82fb29c6da7035d23c19e005354afd822b84cc32e98463370c8106fe
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to other PDF files, indicating a link farm or redirection scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the sheer volume of external links is the primary indicator of malicious activity.

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://dynesolution.com/uploads/1/3/0/3/130313557/sebedunoteponuw.pdf
    • http://thediplip.com/uploads/1/3/0/7/130739773/jawigerajuzas-gagoramujanep.pdf
    • http://thunderstormcoaching.com/uploads/1/3/0/6/130639781/nobofozobaxufa_zofuw_takovonagumefef_jizawitadetawis.pdf
    • http://kindinsurance.net/uploads/1/3/0/2/130288924/rugimulewuzolu.pdf
    • http://flgit.com/uploads/1/3/0/2/130287808/negem-wutug-zimitawid-vixurudux.pdf
    • http://thechampionunit.com/uploads/1/3/0/5/130551604/rikivopefapulu_tejadukep_winewazarani.pdf
    • http://centerofhelleniceducation.org/uploads/1/3/0/6/130639398/demiso.pdf
    • http://studiointrepid.com/uploads/1/3/0/5/130589033/lufujusoda.pdf
    • http://ilsmakerspace.com/uploads/1/3/0/4/130483142/garakis.pdf
    • http://mumsandbubsshop.com/uploads/1/3/0/7/130775959/7005078.pdf
    • http://westernwheelcraftedmonton.com/uploads/1/3/0/9/130969439/gapulafaj.pdf
    • http://recstats.net/uploads/1/3/0/6/130604370/zagof.pdf
    • http://newlifefitz.org/uploads/1/3/0/5/130539093/4c9b78cb726.pdf
    • http://obrienclan.com/uploads/1/3/0/5/130589098/wobeze-xegaxalejituti-dekorilijonuw-kabevijavuki.pdf
    • http://duddonvalleycleaners.com/uploads/1/3/0/5/130588716/pujit_zobujame_nukixiz.pdf
    • http://2020blue.org/uploads/1/3/0/6/130603721/df2f7.pdf
    • http://propowerwashingllc.com/uploads/1/3/0/6/130639147/vijidoduwep-botezenuzuzi-sapara-jodavetuzabix.pdf
    • http://middleclassempowermentzone.org/uploads/1/3/0/6/130604690/b62b8709e26d.pdf
    • http://www.jcsqualityservices.com/uploads/1/3/0/7/130776413/medute.pdf
    • http://visionaryhealthcare.com.au/uploads/1/3/0/3/130323466/9214649.pdf
    • http://rciinc.net/uploads/1/3/0/7/130738821/givememoxabiz.pdf
    • http://a6h.com/uploads/1/3/0/6/130621201/kanuzuz.pdf
    • http://walkoffstudios.com/uploads/1/3/0/2/130287923/sejevimex_roxogabulodemip.pdf
    • http://drdonnabeckerantiaging.com/uploads/1/3/0/3/130379222/forajesesitevozi.pdf
    • http://wcd-jtdgd98u.mgh-r.ch/uploads/1/3/0/5/130550660/130550660.html#umbilical+hernia+cks+nice

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030e2.bin
b3300162258ed6f075cf9c1efa736aaf586618835f0d8900575a7c4e61e8a0e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30E2 7568 bytes

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