Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbd78ec6c419a077…

MALICIOUS

PDF

36.9 KB Authoring application: QPDF
MD5: 0544155b9a5f839341c43b17a865bb8a SHA-1: ac3fbd465772b6bb2ebf9ddc441e3e839d41eb2b SHA-256: cbd78ec6c419a077ef5e667d9947050d17b6162fe0498a9f4512c55997ca8d4b
150 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, a technique often used for SEO poisoning or phishing. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. The primary attack pattern involves redirecting the user to a network of linked documents hosted on various domains.

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://fairworks.net/uploads/1/3/0/2/130271035/bokurajovow.pdf
    • http://latriboo.com/uploads/1/3/0/7/130775032/7114200.pdf
    • http://theposthospitalistcompany.org/uploads/1/3/0/6/130620902/pulije_mupiziw_ninevozenov_tikijifobef.pdf
    • http://suumc.com/uploads/1/3/0/5/130543148/ketadalebodek.pdf
    • http://itsaboutgiving.net/uploads/1/3/0/5/130543483/xelisifoxiliperamudu.pdf
    • http://itmattersnet.com/uploads/1/3/0/5/130588415/pidorusafegile.pdf
    • http://ncmodern.com/uploads/1/3/0/6/130621457/1433834.pdf
    • http://mail.southbeacharts.org/uploads/1/3/0/5/130588497/f30c4c8.pdf
    • http://grouplog.net/uploads/1/3/0/6/130604551/turuzirorirutujesu.pdf
    • http://gcadassociates.com/uploads/1/3/0/2/130273987/3113045.pdf
    • http://www.autoleagueconsul.com/uploads/1/3/0/2/130289296/parajegi.pdf
    • http://www.teaalchemymelbourne.com/uploads/1/3/0/6/130621109/8418676.pdf
    • http://www.thenutritioncraze.com/uploads/1/3/0/5/130544584/kilasan.pdf
    • http://bristolgoddesstemple.org.uk/uploads/1/3/0/4/130436492/48fa0ea041c4f.pdf
    • http://avcanarias.com/uploads/1/3/0/5/130588687/rupaparomuterox-nowosi-varedalepigaf.pdf
    • http://hbartstudio.ca/uploads/1/3/0/4/130491947/8151543.pdf
    • http://escamuel.org/uploads/1/3/0/4/130475918/jakamobubujo.pdf
    • http://nstarlight.com/uploads/1/3/0/7/130775784/919548a7.pdf
    • http://threefoolscoffee.com/uploads/1/3/0/7/130775087/besulijeruxixu.pdf
    • http://cellitelectronics.com/uploads/1/3/0/2/130288939/3426931.pdf
    • http://thebusstopshere.org/uploads/1/3/0/6/130604703/49181805.pdf
    • http://italoservice.com/uploads/1/3/0/5/130542872/fululesutoraw-jawabozob-zifesezobe.pdf
    • http://guitarhugs.com/uploads/1/3/0/6/130639123/3879797.pdf
    • http://alphaprojecttraining.org/uploads/1/3/0/3/130379548/5f3eddaef.pdf
    • http://stopeurocide.com/uploads/1/3/0/4/130483647/130483647.html#solving+quadratic+equations+by+using+quadratic+formula+ppt
    • http://italoservice.com/uploads/1/3/0/5/130542872/fululesutora

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002b97.bin
9185bc090d859744c301b461c1493aafdeb95394163a9b4ae91e26128745b890		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B97 8304 bytes

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