Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fb31fd368e65e3a…

MALICIOUS

PDF

46.1 KB Authoring application: Scribus First seen: 2020-09-24
MD5: 5c13452f58e99c3d91bb114b8be54a3f SHA-1: 59133a73ef3ef683657351b3333b068ef218d329 SHA-256: 1fb31fd368e65e3a6ffc245f24f482df1480b5d4760c210526f85a2318101ab3
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or distribution network. The ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0 further supports a phishing or traffic redirection intent. The document body, though partially corrupted, mentions '3d printing filament issues', which may be a lure to disguise the malicious nature of the 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.
  • 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://spccmd.com/uploads/1/3/0/6/130620590/9788963.pdf In PDF document text
    • http://cothrons.net/uploads/1/3/0/4/130489706/maposojisewon.pdfIn PDF document text
    • http://victormorrowshow.com/uploads/1/3/0/6/130621060/ripigajogewexidupim.pdfIn macro / runtime command snippet
    • http://pocketfriendlyonline.com/uploads/1/3/0/6/130639698/7c3f73544ef8a.pdfIn PDF document text
    • http://eurekarally.com.au/uploads/1/3/0/6/130639342/zijamozota.pdfIn PDF document text
    • http://ctande.com/uploads/1/3/0/6/130605292/717693.pdfIn PDF document text
    • http://leja.modernkutu.com/uploads/2020/01/28/3151358.pdfIn PDF document text
    • http://photosbysarahtucker.com/uploads/1/3/0/7/130738758/921fa4b4ed.pdfIn PDF document text
    • http://docmarksrun.com/uploads/1/3/0/6/130621554/130621554.html#3d+printing+filament+issuesIn PDF document text
🗂 Part of campaign: massrage.ru 4 samples

Related samples 8

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_off000011a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A5 8728 bytes
SHA-256: 150d48c965f23f8695055c97beb798709d338cbf052ff28284060c89a96f5c47

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