Malicious PDF — malware analysis report

Static analysis result for SHA-256 99845b63515f4e1a…

MALICIOUS

PDF

38.6 KB Authoring application: ImageMagick
MD5: e614a7c5663c563004c214ceaf3a2344 SHA-1: ca5f0629612a93b17473bf2da8f9d60bfdac39ab SHA-256: 99845b63515f4e1ac73d42365f97bb2be0b51db0cef4b4bc71fd2b02c054c621
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO spam or to distribute malware. ClamAV identified this as 'Pdf.Phishing.TtraffRobotInstall-7605656-0', and a machine learning classifier also flagged it as malicious. The heuristic 'PDF_SEO_LINK_FARM' confirms the presence of 31 external PDF links, with the dominant host being www.coreydriggs.com. No scripts were extracted from this sample.

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://www.coreydriggs.com/uploads/1/3/0/4/130489351/xarewof-witewirijepevef-ribapupekafinem.pdf
    • http://355cochrane.com/uploads/1/3/0/7/130775174/giwagetamodasa_dexure_tujofurudozegob.pdf
    • http://canberrabirthservices.com/uploads/1/3/0/5/130542872/4033ca87dada1.pdf
    • http://significadodeemojis.com/uploads/1/3/0/6/130620443/bogoledonavebos-pojewegovunu.pdf
    • http://chaoyue.life/uploads/1/3/0/2/130288458/4762104.pdf
    • http://delorenzohaircare.com/uploads/1/3/0/4/130476491/5356b.pdf
    • http://www.mirandacraig.co/uploads/1/3/0/6/130604741/73e5aea96a33a0.pdf
    • http://elev8catering.com/uploads/1/3/0/5/130540293/luliperogemapepexa.pdf
    • http://mikeandthebigscary.com/uploads/1/3/0/5/130590716/85f0c24e2.pdf
    • http://me23-holzgerlingen.de/uploads/1/3/0/7/130739598/zodubadezetepa_dutukeku.pdf
    • http://iowaconcreteproductsandmonuments.com/uploads/1/3/0/5/130539107/sujewut_sonenosojubageg_zezovopobor_militipafu.pdf
    • http://accessclaims.net/uploads/1/3/0/7/130775186/taxofumupok.pdf
    • http://herscheralumni.com/uploads/1/3/0/4/130483983/8188e5ac6770.pdf
    • http://restorevc.com/uploads/1/3/0/6/130639386/riderusu.pdf
    • http://naturalnubians.com/uploads/1/3/0/3/130313176/528a0.pdf
    • http://onhorn.com/uploads/1/3/0/4/130435562/nakikebuduwunidub.pdf
    • http://everythingzenlife.com/uploads/1/3/0/8/130813447/6470ec7308e36.pdf
    • http://www.xp-nurition.com/uploads/1/3/0/6/130604731/2735989.pdf
    • http://newhoroscopedates.net/uploads/1/3/0/6/130620731/kulak-toditulet.pdf
    • http://mrvangeelsclass.com/uploads/1/3/0/6/130604147/8409d6a81a3c9.pdf
    • http://newenglandopportunityproject.org/uploads/1/3/0/8/130874520/suxalabofuju.pdf
    • http://www.vogtlife.com/uploads/1/3/0/6/130622084/86e0f3e31.pdf
    • http://richkane.biz/uploads/1/3/0/6/130604306/130604306.html#comma+splice+sentence+error
    • http://www.coreydriggs.com/u

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000343a.bin
2046e5c140c1caf1870c45d39ace2e4caf435a70c221b92a94abc7197915fcb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x343A 8236 bytes

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