Malicious PDF — malware analysis report

Static analysis result for SHA-256 7573fdd171b1af0c…

MALICIOUS

PDF

69.3 KB Authoring application: QPDF
MD5: 52778f4c0308c35263abbd058430aea4 SHA-1: 05c48f3ea9c40d74511423167a38423e80376101 SHA-256: 7573fdd171b1af0ca910dfb6b7ca3a1d15ae8e029c89734b5d5d7e334ce514f8
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, a technique often used for SEO poisoning or to distribute further malicious content. ClamAV detected this as Pdf.Phishing.TtraffRobotInstall, and a machine learning classifier also flagged it as malicious. The embedded URLs are the primary indicators of malicious intent, likely serving as a lure or a distribution mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://drkontry.net/uploads/1/3/0/6/130621608/nowedefivew.pdf
    • http://nycraftworks.com/uploads/1/3/0/2/130270971/aa68f6821b94ab5.pdf
    • http://crispandsmooth.com/uploads/1/3/0/4/130476168/fazozoriponajatuveri.pdf
    • http://divehuntfish.com/uploads/1/3/0/4/130476013/gaxijidebokovedaka.pdf
    • http://school-playgroundequipment.com/uploads/1/3/0/2/130289240/juxuzubeza_folawu_dugulon_bagokakuzav.pdf
    • http://myphotographybyjess.com/uploads/1/3/0/5/130545684/kovufuv_xorolul_xodumexom.pdf
    • http://bluseafoodandbar.com/uploads/1/3/0/5/130547576/gigiwan_defiji.pdf
    • http://mocommunitytrees.com/uploads/1/3/0/4/130435834/443a1eddd2b1.pdf
    • http://blueegg.net/uploads/1/3/0/6/130621597/777193.pdf
    • http://blackmomsstaylifted.com/uploads/1/3/0/2/130272504/rorinumisepif.pdf
    • http://ccamsolutions.com/uploads/1/3/0/3/130323151/951461.pdf
    • http://radiantalchemywellness.com/uploads/1/3/0/7/130775228/ruroketapuniz_kutoxutenim_wiruveb.pdf
    • http://www.nortiaequities.com/uploads/1/3/0/5/130589020/bufus.pdf
    • http://kbtezkh.brdge.org/uploads/1/3/0/8/130874606/130874606.html#strauss+ainsi+parlait+zarathoustra+ouverture
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001562.bin
08e0173ec3db80a29fa7fc273bd2f3bdf8ca3626be6314813a9903431dd89000		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1562 13164 bytes
font_01_sfnt_off0000c086.bin
e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC086 2652 bytes
font_02_sfnt_off0000c954.bin
f335bbb8769c533cbca16f6384a9be7e2e65528b9693bf598f9b6a21ed261b2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC954 16036 bytes

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