Malicious PDF — malware analysis report

Static analysis result for SHA-256 8988b42cc538be6b…

MALICIOUS

PDF

39.2 KB Authoring application: pdf-parser First seen: 2020-09-04
MD5: 691f32af8d8cc935aacc3f76789e147e SHA-1: 78c94fd4e0a0ab8e183946cd7f7aff2091ce64cb SHA-256: 8988b42cc538be6b1a53c1bf0867ff1b2856ecca7ac26e37b4fb562a2564d4d8
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. These links point to numerous PDF files hosted on various domains, suggesting a coordinated effort to manipulate search engine results or distribute malicious content. The ClamAV detection and ML classifier further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://crazyjean.com/uploads/1/3/0/4/130483875/bavibobewak_vokojaruji.pdf In PDF document text
    • http://leaningdogstuffies.com/uploads/1/3/0/7/130739152/a4ad7b2cd75e.pdfIn PDF document text
    • http://loebclassicallibrary.net/uploads/1/3/0/2/130287835/vosogitevuramu-kubazebomomito-nurodajajesi.pdfIn PDF document text
    • http://nomegasitehere.com/uploads/1/3/0/6/130640175/2064773.pdfIn PDF document text
    • http://www.coralsunaviation.net/uploads/1/3/0/4/130489090/7511601.pdfIn PDF document text
    • http://molisanisocal.com/uploads/1/3/0/5/130539092/kejodipor.pdfIn PDF document text
    • http://jamesradack.net/uploads/1/3/0/4/130489530/7006533.pdfIn PDF document text
    • http://holdensmithproductions.com/uploads/1/3/0/6/130620640/9335942.pdfIn PDF document text
    • http://tintwerx.net/uploads/1/3/0/7/130775002/20e3139742.pdfIn PDF document text
    • http://romanpublications.com/uploads/1/3/0/7/130776747/cb723abf.pdfIn PDF document text
    • http://becomebigm.com/uploads/1/3/0/4/130483539/31677b0e1c88669.pdfIn PDF document text
    • http://webmail.digcitinstitute.com/uploads/1/3/0/3/130323437/zupazopobunas.pdfIn PDF document text
    • http://hostmaster.insiderrisk.co.uk/uploads/1/3/0/8/130874371/nopijedezinox.pdfIn PDF document text
    • http://www.wordlaundry.com.au/uploads/1/3/0/2/130289502/fddc58b.pdfIn PDF document text
    • http://74-123-73-205.mgwnet.com/uploads/1/3/0/4/130488217/130488217.html#the+chronicles+of+narnia+silver+chairIn PDF document text

Related samples 4

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_off00004024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4024 7732 bytes
SHA-256: 81d696c82f69ff45b8818609c4ca0578ba537beeb1a97fddd4c2faf597236919

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