Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c1e9059e44f1d29…

MALICIOUS

PDF

39.6 KB Authoring application: Nitro PDF First seen: 2021-09-24
MD5: a5acb09352affcd54123c4d825723a60 SHA-1: 083eae7737acb7c3dec01eacbbc55c97e232341a SHA-256: 8c1e9059e44f1d29576511d939bb850314bc2f8fd8a15aabf8d32e45e42c7a69
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • 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://loj.vipiski-besplatno19.icu/uploads/2020/01/28/doxowagidexin.pdf In PDF document text
    • http://jow.tzvetnielinzi.ru/uploads/2020/01/28/8746555.pdfIn PDF document text
    • http://davidimu.buymetoday.ru/uploads/2020/01/28/nekamitagavujazob.pdfIn PDF document text
    • http://rentaprice.ru/uploads/2020/01/28/berezevanilupi_vepezep_tofobemomojofa.pdfIn PDF document text
    • http://jodovox.mstaml-tb.icu/uploads/2020/01/28/lemetabebe.pdfIn PDF document text
    • http://xepura.best-journal.ru/uploads/2020/01/28/eb29d9c280b956b.pdfIn PDF document text
    • http://gas.posital-encoder.ru/uploads/2020/01/28/titopivev.pdfIn PDF document text
    • http://tigixe.cosmuslug.com/uploads/2020/01/27/86bbd0a9ce6f.pdfIn PDF document text
    • https://fupomopotoko.weebly.com/uploads/1/3/0/4/130489539/130489539.html#that+portion+of+the+marginal+cost+curve+lying+above+minimum+average+variable+costIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F3 8008 bytes
SHA-256: fbdb93173af3b6719623fd81089fb48a4df4ab1b6455faa1c1d8264377a60301
font_01_sfnt_off0000541c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x541C 16036 bytes
SHA-256: 779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63

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