Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c9a62401e598e0d…

MALICIOUS

PDF

34.6 KB Authoring application: Karbon
MD5: d25dad83f05c5fa752ad7c30d3d904f5 SHA-1: 1c219cd84bc4bcce1c1ac34ded64f814927fc70b SHA-256: 5c9a62401e598e0d8dbeb6b7a2a15ccf4eca215af5721b85fdf14a44bddda1f6
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files hosted on various domains, indicating a link farm or SEO spam campaign. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly suggest malicious intent. The document body, though heavily obfuscated, contains fragments of URLs that align with the embedded link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://topviewrealstate.com/uploads/1/3/0/5/130588870/3004119.pdf
    • http://blazzt.com/uploads/1/3/0/4/130488248/fasotakul.pdf
    • http://mail.r3fine.com/uploads/1/3/0/4/130436313/db68d77a53164.pdf
    • http://holidayhoarders.com/uploads/1/3/0/6/130621457/wakimufezase_gemapi.pdf
    • http://caitlindoula.com/uploads/1/3/0/7/130738562/4143037.pdf
    • http://www.generationsmemorials.com/uploads/1/3/0/2/130288416/biwitusa_pipolur_seroju_jivezusevi.pdf
    • http://mail.burritoprincess.com/uploads/1/3/0/5/130590169/lakovowumata-nupegedimunoto-takazivedi-perapog.pdf
    • http://bakersfieldbreakoutzone.com/uploads/1/3/0/8/130814161/1845406.pdf
    • http://coachingkits.co/uploads/1/3/0/3/130379529/ba9775a.pdf
    • http://write-move.com/uploads/1/3/0/8/130814298/e4a694e88.pdf
    • http://steveferrinbuilder.com/uploads/1/3/0/8/130814157/3ea9aa3ebac18.pdf
    • http://www.noncognitive.ca/uploads/1/3/0/5/130543772/xuduri-luxosoro.pdf
    • http://rtr-e1-mnfdpa-twrln.indigowireless.com/uploads/1/3/0/4/130489253/zusonunolax.pdf
    • http://onlygodcanjudgeus.com/uploads/1/3/0/3/130324005/7a24b7642807289.pdf
    • http://synchronyled.us/uploads/1/3/0/4/130483592/9187063.pdf
    • http://origins-explore.net/uploads/1/3/0/7/130739492/taxawesegudin.pdf
    • http://www.grantlady.com/uploads/1/3/0/5/130539840/ladofapas_pozilijofem.pdf
    • http://www.pngsocialmarketing.com/uploads/1/3/0/5/130590030/ae2a6549f9.pdf
    • http://host205.carmichaelnl.com/uploads/1/3/0/2/130288455/130288455.html#possessive+pronouns+worksheet+for+grade+5

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002814.bin
2a9b475c679e833552338afa9fa5ed01cffaa5573b5e7d125e7102c90101a125		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2814 8248 bytes

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