Malicious PDF — malware analysis report

Static analysis result for SHA-256 928c75dec8b32642…

MALICIOUS

PDF

38.2 KB Authoring application: Pdftk First seen: 2020-09-24
MD5: b88f3855bfe49124335df6bfc0b607ff SHA-1: 231b9ce9f879bcad56f3c0547532bde1ceab514c SHA-256: 928c75dec8b32642b2ba2c7dc37d64586eae4209eb494f581abce8b27ff93dea
134 Risk Score

Malware Insights

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

The sample is a PDF document that contains multiple external URIs pointing to other PDF files. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically related to phishing. The document body references a sensitive topic ('Gosport war memorial hospital deaths report') to potentially entice users to click on the embedded links, which likely lead to further malicious content or exploits. No scripts were extracted from this sample.

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://mimibug.com/uploads/1/3/0/6/130620479/9e10e257f3f.pdf PDF link annotation
    • http://montecristifinesouthamericanarts.com/uploads/1/3/0/2/130288707/94907.pdfIn PDF document text
    • http://creatingtheconditionsfortransformation.com/uploads/1/3/0/2/130289244/c7ad2b.pdfIn PDF document text
    • http://defiddesign.com.au/uploads/1/3/0/4/130483527/renerogedebugo_vusanariku_naruki.pdfIn PDF document text
    • http://moabrecycles.com/uploads/1/3/0/6/130603842/menida-xekijevojob-kosaf-nolebitasexi.pdfIn PDF document text
    • http://juliejesternewman.com/uploads/1/3/0/4/130435524/130435524.html#gosport+war+memorial+hospital+deaths+reportIn PDF document text

Related samples 7

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_off00001170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1170 9052 bytes
SHA-256: 1076f9362adc6445ed6b1a7c11d25dfb61c7bfda9a5e4fe0fcfbe974ac541be2

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