Malicious PDF — malware analysis report

Static analysis result for SHA-256 5657fb97f53d91f4…

MALICIOUS

PDF

48.1 KB Authoring application: pstoedit First seen: 2020-09-07
MD5: a2ae043e4c877d2ff979d76fe5326c9f SHA-1: 7b24a8064c89a26e6f5a2e4f05cef386b2449d02 SHA-256: 5657fb97f53d91f4cdc15072401f0a9b62d78bf8a5cad3e7901c6909319f9c92
152 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains. This behavior is indicative of a link farm, often used for SEO poisoning or to distribute malicious content. The ClamAV detection and ML classifier further support its malicious nature. The document body content appears to be corrupted or truncated, providing no additional context on the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://anderson-missions.com/uploads/1/3/0/7/130775784/muminopofezuja-bokes.pdf In PDF document text
    • http://mybackyardbuilder.com/uploads/1/3/0/3/130313148/680775.pdfIn PDF document text
    • http://assistancedogassociation.org/uploads/1/3/0/2/130289702/3526816.pdfIn PDF document text
    • http://www.outlawyarns.com/uploads/1/3/0/3/130323253/157ad3d504e.pdfIn PDF document text
    • http://rktttherapy.com/uploads/1/3/0/6/130605339/jubixira.pdfIn PDF document text
    • http://starvegutfarm.com/uploads/1/3/0/3/130313038/84f907c.pdfIn PDF document text
    • http://ryan-foster.com/uploads/1/3/0/6/130621201/7fdaf0a6e83.pdfIn PDF document text
    • http://nevermoreacrespetrescueinc.com/uploads/1/3/0/5/130588550/6167560.pdfIn PDF document text
    • http://agapa.net/uploads/1/3/0/6/130639326/putunafujon-buwatiduzafi-jutoz.pdfIn PDF document text
    • http://gregwcraft.com/uploads/1/3/0/7/130775969/da1fd0d67d77.pdfIn PDF document text
    • http://benjaminsmithmusic.net/uploads/1/3/0/8/130814673/mepez_livijaduvev_vitadogotudag_wiladagopo.pdfIn PDF document text
    • http://learnized.com/uploads/1/3/0/6/130640107/tinunasavik-xawut.pdfIn PDF document text
    • http://webdisk.brillomedia.com/uploads/1/3/0/3/130323597/vobutixaduki.pdfIn PDF document text
    • http://babaanddada.com/uploads/1/3/0/7/130775808/78d7cc13.pdfIn PDF document text
    • http://capellandecampo.com/uploads/1/3/0/2/130274032/4629910.pdfIn PDF document text
    • http://mrsmorones.com/uploads/1/3/0/6/130620803/1083149.pdfIn PDF document text
    • http://wenji.bpmtc.com/uploads/1/3/0/8/130815080/130815080.html#samsung+a50+manual+pdf+espa%C3%B1olIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.adobe.com/).NotoIn PDF document text
    • http://www.google.com/get/noto/http://www.adobe.com/type/ThisIn PDF document text
    • http://scripts.sil.org/OFLNotoIn PDF document text
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3148 2532 bytes
SHA-256: 75b2ca24d697ec5f4b6f31661874e997e3afaa9402cdbb1efb827c7cf5a3fb4f
font_01_sfnt_off00003bde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BDE 4984 bytes
SHA-256: 73a1984f127b78f6868f142f056627410d70afac515264b95ee4cf81bb388972
font_02_sfnt_off00004b30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B30 2616 bytes
SHA-256: d907c570f1f8f2d62f38d7529dbf77de46ca3a1917ec53aca7a78bae59874b04
font_03_sfnt_off00005847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5847 12192 bytes
SHA-256: deafef9c8a7c942deee7ab953899f9e1b3b62b8984b88cf3fcdafa03dead3185

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