Malicious PDF — malware analysis report

Static analysis result for SHA-256 d94c8c372d33279d…

MALICIOUS

PDF

42.4 KB Authoring application: Mobipocket Creator
MD5: f37dc1eb688ffa6eb887781931a8c50c SHA-1: ae4c1601cc5bca522b5fc2a99468d4c9335fa886 SHA-256: d94c8c372d33279d68fac67faceb5a6936bbdf4894eea18b57c3897c633e73ac
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO manipulation or to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The primary IOCs are the numerous URLs pointing to external PDF resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://wedatoj.store/uploads/1/3/0/7/130739315/2450237.pdf
    • http://wiseonreading.com/uploads/1/3/0/8/130873810/1563237.pdf
    • http://kathiegreenmedia.com/uploads/1/3/0/6/130639172/2333573.pdf
    • http://www.csiasia.org/uploads/1/3/0/4/130488165/jafevasu-nowosutexadeva-sunadiji.pdf
    • http://www.denebebbington.co.uk/uploads/1/3/0/8/130874250/2473245.pdf
    • http://benlasli.store/uploads/1/3/0/2/130289241/5477797.pdf
    • http://cityonahillcommunityoutreach.org/uploads/1/3/0/7/130775013/8245123.pdf
    • http://nursesdirectllc.com/uploads/1/3/0/6/130639291/mawapazatukoruwipilo.pdf
    • http://absoluteventoparty.com/uploads/1/3/0/6/130603673/fajezo-bitim-sateritolokelo.pdf
    • http://laurelmedpa.com/uploads/1/3/0/6/130639800/d3ee27a.pdf
    • http://fertilitymassagebristol.com/uploads/1/3/0/4/130477228/fulisik.pdf
    • http://bbvillahallau.com/uploads/1/3/0/7/130739885/87d75c5a234030.pdf
    • http://autoconn.com/uploads/1/3/0/3/130379610/nerekamagekabutisu.pdf
    • http://arroyoink.com/uploads/1/3/0/6/130621805/1522175.pdf
    • http://centerforculturalfitness.org/uploads/1/3/0/2/130270745/tutakaxepotaxep-babudi-kubujatofuzito-fukeb.pdf
    • http://zerno.tatar/uploads/1/3/0/7/130739860/c1c7e8a9a.pdf
    • http://k-statebasketballplayers.net/uploads/1/3/0/5/130551083/7906434.pdf
    • http://jvwritingv3.club/uploads/1/3/0/7/130776609/252fed142576.pdf
    • http://brucedaleestate.com/uploads/1/3/0/6/130621119/gatitiba.pdf
    • http://subscription-biling-spotlfy.com/uploads/1/3/0/7/130776252/rebonizu_zeziba.pdf
    • http://advancedliferesources.com/uploads/1/3/0/7/130739621/volirabifa.pdf
    • http://choptallybarber.shop/uploads/1/3/0/6/130639924/texisirebaj.pdf
    • http://www.tannerbrewing.com/uploads/1/3/0/5/130539652/watubixetuw_gogilosawonomu_tutezim.pdf
    • http://www.hillaryplog.com/uploads/1/3/0/5/130550752/130550752.html#hydraulic+scissor+lift+table+catalogue
    • http://jvwritingv3.club/uplo

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003357.bin
87fd6b1a35a64f5c2d30902eea89631a9c05d6b36ef70c6d0cee4d2ad867525e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3357 2596 bytes
font_01_sfnt_off00003f56.bin
bc5d08cd66fbd6d9ee49877d5fad9beae8e26459906c7ff4dc5263a8e35cd786		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3F56 9116 bytes

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