Malicious PDF — malware analysis report

Static analysis result for SHA-256 62691b9a89cd7e3c…

MALICIOUS

PDF

49.3 KB Authoring application: Poppler-utils
MD5: 34a5aecc06700b694470e3148d089dda SHA-1: 19c1e49ff0475333095b37e6284a626f1aed553c SHA-256: 62691b9a89cd7e3c37eb7b0942e1e2ab43555fc1c1fb7e0f5ad8e57866b5d963
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to external PDF files, indicative of a link farm or phishing campaign. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or SEO spam. No scripts were extracted, but the sheer volume of external links suggests a mechanism for distributing further malicious content or redirecting users to fraudulent sites.

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://laxa.vivahome.ru/uploads/2020/01/28/nafudumiwujisuw-mobogapu-vokefusajadu-silujawamuwufep.pdf
    • http://bofam-noreply.com/uploads/2020/01/28/refesuzanodibab.pdf
    • http://rovofewaro.vipiski-besplatno.icu/uploads/2020/01/28/vifawan.pdf
    • http://wilod.thebestessay.info/uploads/2020/01/28/zafamuxaf-xurisilefekarid-vusataxep-gejegupipaximo.pdf
    • http://pulikut.1posvetu.com/uploads/2020/01/28/kevogugelutinin-futak.pdf
    • http://gogiv.netto-tc.ru/uploads/2020/01/27/b766f9.pdf
    • http://imperiya.club/uploads/2020/01/27/vagiponexorizizor.pdf
    • http://lulubifo.nakrutkanow.xyz/uploads/2020/01/27/54608ef12f.pdf
    • http://keka.help-vk.ru/uploads/2020/01/28/253e5f42bb86a85.pdf
    • http://powusabaru.garyschuen.com/uploads/2020/01/27/kekazamenojiba.pdf
    • http://fuxu.florissimo29.ru/uploads/2020/01/27/7905497.pdf
    • http://paypal-account-support.bz/uploads/2020/01/27/7b5e6347d77.pdf
    • https://nozezuneladew.weebly.com/uploads/1/3/0/2/130288386/4df982e02.pdf
    • http://xidowuw.beri-bolshe.com/uploads/2020/01/28/deripi.pdf
    • http://sportivnik.com/uploads/2020/01/28/doresidik.pdf
    • http://freoplew.icu/uploads/2020/01/28/6ee884f45d.pdf
    • https://nibegusowok.weebly.com/uploads/1/3/0/4/130476322/bukukubukelofi.pdf
    • http://plaksi.digital/uploads/2020/01/28/713f93.pdf
    • https://daxakijegukopi.weebly.com/uploads/1/3/0/2/130274291/6366382.pdf
    • http://loxa.metall-msc.ru/uploads/2020/01/28/6342901.pdf
    • http://zoomroom63.ru/uploads/2020/01/28/mezesegapulu-wusevisudipos.pdf
    • https://ginosakokonizu.weebly.com/uploads/1/3/0/4/130483407/130483407.html#gov.uk+shortage+occupation+list
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000166f.bin
d99725c5f99dce3d75eb322e188a5d01a9062871494409e166ab042282cb7342		 pdf-font-stream PDF embedded font (sfnt) at offset 0x166F 8808 bytes
font_01_sfnt_off0000855e.bin
e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x855E 2652 bytes

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