Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d179958694e44c3…

MALICIOUS

PDF

38.8 KB Authoring application: PDF Studio
MD5: 6db81882470c5585d3dc9fd531df29b4 SHA-1: c7c72ff352937a4b2ceb0993dfac3ed91dd85958 SHA-256: 5d179958694e44c37f3e7d3465c6ececbd5689c13f4a7e110dbdcd58935623ab
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to PDF files hosted on various domains, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, mentions 'Motivation letter for job seeker visa germany', which serves as a lure to encourage users to interact with the embedded links.

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://enculturepress.com/uploads/1/3/0/5/130551746/1340791.pdf
    • http://nilsravalvecoverracing.com/uploads/1/3/0/6/130620857/ranidazome.pdf
    • http://theabsurdists.com/uploads/1/3/0/5/130546717/79725f3b3c.pdf
    • http://waxxbrothers.com/uploads/1/3/0/2/130288552/0bf616a9b2f8850.pdf
    • http://www.ferry-universityapplication.com/uploads/1/3/0/6/130604340/842a2e7e3c6.pdf
    • http://www.kaninpaletten.com/uploads/1/3/0/3/130379272/3202386.pdf
    • http://proxyregister.com/uploads/1/3/0/5/130590653/46b00f7936.pdf
    • http://webmail.cohillway.com/uploads/1/3/0/3/130379113/d679e011e5.pdf
    • http://eclecticquilting.com/uploads/1/3/0/5/130589156/4907646.pdf
    • http://boldcounsel.net/uploads/1/3/0/6/130620782/bodidatulura_duwimefi.pdf
    • http://myfujingarts.com/uploads/1/3/0/5/130541077/zejunewisiju.pdf
    • http://karlmart.in/uploads/1/3/0/3/130312980/xugude.pdf
    • http://totallygnarly80srewindblogspot.com/uploads/1/3/0/6/130640133/362213.pdf
    • http://miraclecreations.shop/uploads/1/3/0/2/130270936/bd20dd781b6d7.pdf
    • http://www.arielandresalmada.com/uploads/1/3/0/5/130543671/wizitof-zuwoxuzo.pdf
    • http://mthermonministries.org/uploads/1/3/0/7/130739197/kamufobigilixo.pdf
    • http://sewakholding.com/uploads/1/3/0/5/130589230/4333775.pdf
    • http://mail.motionimports.com/uploads/1/3/0/4/130476429/niguva_seduxawibipo_wimorabemabal_wolipuzipu.pdf
    • http://cmcrossflow.com/uploads/1/3/0/3/130313067/c1ae73d2b1d9eb.pdf
    • http://www.changingstep.com/uploads/1/3/0/4/130488121/pabes.pdf
    • http://ozkaritz.net/uploads/1/3/0/4/130483527/perafodekibarofalava.pdf
    • http://www.aromaterapiaclinica.com/uploads/1/3/0/5/130588943/288976.pdf
    • http://lebojin.br3h.com/uploads/1/3/0/6/130639661/130639661.html#motivation+letter+for+job+seeker+visa+germany

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032d7.bin
d7bb445b0c777a05c99b147f708596c24040533e65934400834fa113a0964f2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32D7 9404 bytes

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