Malicious PDF — malware analysis report

Static analysis result for SHA-256 250dbe19746b7089…

MALICIOUS

PDF

52.1 KB Authoring application: Mobipocket Creator
MD5: c9bbc1dfaae2e896a684b3b7f7f6a6cf SHA-1: 98a8cc353300b945d38a4f84219b6c91581102a9 SHA-256: 250dbe19746b7089de6341a7eb613a004941d91f6e141d286bad71a1cf199440
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO spam or to distribute malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly indicate malicious intent. The primary attack pattern involves redirecting users to a network of linked documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://basculascamry.com/uploads/1/3/0/3/130379457/dadoxaxawaruxuwog.pdf
    • http://biztriage.com/uploads/1/3/0/5/130589411/supavikeg.pdf
    • http://sportswigsonline.com/uploads/1/3/0/6/130620781/miwapetarukig.pdf
    • http://musesinthevineyard.com/uploads/1/3/0/4/130435531/f6f7851d4f.pdf
    • http://moorestownlegendslax.com/uploads/1/3/0/5/130589313/zagasu.pdf
    • http://lizamaroni.com/uploads/1/3/0/4/130483660/9aba8fba5e5d6cd.pdf
    • http://lisakleinspeech.com/uploads/1/3/0/4/130435978/vumixilatikoxuk.pdf
    • http://ndhumanities.com/uploads/1/3/0/2/130271090/venujake-zijera-setoj.pdf
    • http://nolaclay.com/uploads/1/3/0/5/130551341/zumesezur.pdf
    • http://karemes.zincadoexpress.com/uploads/2020/01/28/gavowidamu.pdf
    • https://gorotoju.weebly.com/uploads/1/3/0/2/130270885/1347926.pdf
    • http://taideinto.com/uploads/1/3/0/5/130589227/c9e042e26a0e46.pdf
    • https://sabibisopad.weebly.com/uploads/1/3/0/5/130539348/vipatuloj_pavotutu.pdf
    • http://jukeboxarcade.com/uploads/1/3/0/2/130288334/7762427.pdf
    • http://naxedef.themaharashtra.com/uploads/2020/01/28/69699f1d0725019.pdf
    • http://studio.dayafoundation.org/uploads/1/3/0/5/130589217/d8078068ed545.pdf
    • http://solit.studio/uploads/1/3/0/6/130620685/148232.pdf
    • http://riverraisinjazzfestival.org/uploads/1/3/0/5/130546937/lewodidosogukaxa.pdf
    • https://pumutuwido.weebly.com/uploads/1/3/0/2/130288761/1422484.pdf
    • http://ctshakerfurniture.com/uploads/1/3/0/6/130621666/6469081.pdf
    • http://debarygolfcarts.com/uploads/1/3/0/6/130621865/c18b99.pdf
    • http://wufutuji.nataliapetri.com/uploads/2020/01/28/1a1cf1e7.pdf
    • http://beautifulpinkk.com/uploads/1/3/0/4/130489358/wurudofajomekupop.pdf
    • http://onlygodcanjudgeus.com/uploads/1/3/0/6/130639175/1056002.pdf
    • http://carpetcleancary.com/uploads/1/3/0/3/130323110/130323110.html#ba+bed+syllabus+2019+pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000016f1.bin
25632016ad9d62f63ee46de4fcae3e01329fbe0b0b01b9ab33e2cb0c4c764875		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16F1 8036 bytes
font_01_sfnt_off00007adb.bin
97b5fb3a516c01dd2f4e441752358df6ac28d50466b9c3239f49b143970f46f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ADB 11480 bytes

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