Malicious PDF — malware analysis report

Static analysis result for SHA-256 f938fa56c337347f…

MALICIOUS

PDF

43.1 KB Authoring application: Nitro PDF First seen: 2020-09-15
MD5: c0b229ca2e8579a58e782a2af8d11b4e SHA-1: ae0c1df4cba7c64fb901b5ffd1394c139743618d SHA-256: f938fa56c337347fbd81880f602de63f30797280ef042cbb7b8ac47dd5d82f94
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. This suggests a link farm or redirection strategy, likely intended to distribute malicious content or phish for credentials. The ClamAV detection and ML classifier further support the malicious nature of the file. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nataliavargova.com/uploads/1/3/0/6/130604225/gasozi-fanev-gowizakebavuf.pdf In PDF document text
    • http://chantelleshaw.com/uploads/1/3/0/6/130620666/mixenulefodozizadare.pdfIn PDF document text
    • http://paparazziservices.com/uploads/1/3/0/4/130477249/8021559.pdfIn PDF document text
    • https://ginosakokonizu.weebly.com/uploads/1/3/0/4/130483407/32da33ea4.pdfIn PDF document text
    • http://strongholdequineequipment.com/uploads/1/3/0/5/130588702/joxiwefopefafo.pdfIn PDF document text
    • http://aaasteamandsauna.com/uploads/1/3/0/4/130491271/vikivorup_wuzenifav_wetegugananipa.pdfIn PDF document text
    • http://cocovonbonbon.com/uploads/1/3/0/5/130588988/6640130.pdfIn PDF document text
    • http://acouturelife.com/uploads/1/3/0/5/130551524/130551524.html#flute+piano+duet+sheet+music+christmasIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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_off000011d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D4 8776 bytes
SHA-256: fdd70ccc695e172e3f8c2ec130ddaae7b8263aba5c830767c618f8fc289634ff
font_01_sfnt_off00006244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6244 16068 bytes
SHA-256: 6db2f878e0fd57d3a351d0d81a5ccd7b58f68df6728dadc3aee3ebeb1a1d6e60

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