Malicious PDF — malware analysis report

Static analysis result for SHA-256 889891ebe33282df…

MALICIOUS

PDF

51.9 KB Authoring application: GIMP First seen: 2020-09-24
MD5: 4090c6f8dab6ad919cfd7accbe989997 SHA-1: eafea213b701d28e8cf83d96d92b53707a867ecb SHA-256: 889891ebe33282df49a8f14dd07bb04ce0c3873cab6039ad7086c9c87fc23fca
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, many of which point to other PDF files on unrelated domains. This behavior is indicative of a link farm or a method to distribute malicious content indirectly. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier further support its malicious nature. No scripts were extracted, but the extensive URL distribution suggests a phishing or content-spreading campaign.

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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://leimmigrationlaw.com/uploads/1/3/0/8/130813592/c8a2919.pdf In PDF document text
    • http://acsnutritionfitness.com/uploads/1/3/0/7/130775747/koxarup.pdfIn PDF document text
    • http://dailyboatdeals.com/uploads/1/3/0/7/130776817/3432fe0453b6c8.pdfIn PDF document text
    • http://adcscripting.online/uploads/1/3/0/4/130488512/winajidejobez_mumasepi_retuwiwifodaj.pdfIn PDF document text
    • http://www.gleeaquadragons.com/uploads/1/3/0/6/130604201/zefidij.pdfIn macro / runtime command snippet
    • http://cpanel.scholarshipsforscholarsofmontebello.org/uploads/1/3/0/5/130539678/adf049fe.pdfIn PDF document text
    • http://mysticalrockny.com/uploads/1/3/0/6/130604977/bafonanixijuku_jozubuze_latofefaweba_gijop.pdfIn PDF document text
    • http://pausejudgement.com/uploads/1/3/0/4/130483215/pekeba_xujodod_tedexefonanagen.pdfIn PDF document text
    • http://midcountydentalcare.com/uploads/1/3/0/6/130621409/xafejovutisorumaxam.pdfIn PDF document text
    • http://ovenology.com/uploads/1/3/0/5/130551659/mevida.pdfIn PDF document text
    • http://supergcoating.com/uploads/1/3/0/6/130639038/tisode.pdfIn PDF document text
    • http://script-scanner.com/uploads/1/3/0/6/130620163/8588c.pdfIn PDF document text
    • http://southeasternclubcl.com/uploads/1/3/0/5/130588527/9f1b44.pdfIn PDF document text
    • http://sherbetstreet.com/uploads/1/3/0/4/130488736/getum.pdfIn PDF document text
    • http://cstricklermusic.com/uploads/1/3/0/8/130874090/89e4310ca.pdfIn PDF document text
    • http://chewoncakes.com/uploads/1/3/0/6/130639166/130639166.html#navodaya+school+entrance+exam+dateIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
🗂 Part of campaign: cairobritishcollege.com 18 samples

Related samples 4

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_off00005761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5761 16092 bytes
SHA-256: 406773549559360a7f4609cba7635045f4fc43af2cca6a6bae31ca6dbb98e8fe
font_01_sfnt_off00006f08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F08 8624 bytes
SHA-256: 2fa9df7c458b57e0d5cadeab608e348187366ef7e54dade4a85f0bc3eb5cae1f

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