Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2ca6a31d886f384…

MALICIOUS

PDF

34.0 KB Authoring application: pstoedit First seen: 2020-09-24
MD5: 1e6580dc92eba5cc1079b46713107ce0 SHA-1: c65b647bb88aeae1e68bf2d6ffd4c5dee8dfc900 SHA-256: f2ca6a31d886f384dfd5a6aad0a9fce90f5dabfbe5d0da2c2df8c10cb65f89e8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which point to other PDF files, suggesting a link farm designed for SEO manipulation or to host malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of a 'download' lure further supports this, aiming to trick users into clicking on the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://daforuwemo.rostov-posutochno.ru/uploads/2020/01/29/penes.pdf In PDF document text
    • http://mmflackdesigns.com/uploads/1/3/0/6/130604072/fuwozaju.pdfIn PDF document text
    • http://unftelecom.org/uploads/1/3/0/2/130272260/zumukudonozemilet.pdfIn PDF document text
    • http://lachozaspa.com/uploads/1/3/0/6/130639397/xokit-barutumivora.pdfIn PDF document text
    • https://fovulogok.weebly.com/uploads/1/3/0/5/130588336/9207249.pdfIn PDF document text
    • http://sabrepartners.com/uploads/1/3/0/6/130621744/kafesora.pdfIn PDF document text
    • http://mycorporateteambuilding.com/uploads/1/3/0/4/130476390/gigunesifulevivef.pdfIn PDF document text
    • http://gojaxale.visit-kazan.ru/uploads/2020/01/29/tivoko-zufipovero-vuxaxa.pdfIn PDF document text
    • http://clucktruckportland.com/uploads/1/3/0/4/130436049/130436049.html#rehab+protocol+achilles+tendon+repairIn PDF document text

Related samples 3

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B5 7684 bytes
SHA-256: f6cc089290fff043ed1152d608a6a76b21d9a1bf88525031d87172be92faba3a

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