Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8de254f4eeb7e8f…

MALICIOUS

PDF

48.4 KB Authoring application: Inkscape First seen: 2020-09-24
MD5: 2f94f2de27d2451a005caa7ffd5f66cc SHA-1: 618f3a439d56b4bc44bc163b15321c5da2796c4d SHA-256: d8de254f4eeb7e8f8e9517dc9c491de55fb96477dfdbb8a2d4dbdfb8b6f0169d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded URLs, identified as a link farm, which is a common tactic for SEO spam and phishing campaigns. ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier's high confidence score further support its malicious nature. The document body, though heavily obfuscated, contains references to interview questions, potentially a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://infoblicity.com/uploads/1/3/0/7/130775156/zavitajo_marut.pdf In PDF document text
    • http://marketingshingle.net/uploads/1/3/0/7/130775422/tutadufu_mizoratulaxase_riluvewilikepiv_papilisoruxag.pdfIn PDF document text
    • http://studio-754.com/uploads/1/3/0/4/130483114/rosumuv.pdfIn PDF document text
    • http://calmongoods.com/uploads/1/3/0/5/130538817/wadekes-wexifap-roruj.pdfIn PDF document text
    • http://laspromos.com/uploads/1/3/0/2/130272619/subixobazow_xevolomaras.pdfIn PDF document text
    • http://kitchitup.com/uploads/1/3/0/8/130873850/4253856.pdfIn PDF document text
    • http://angelsons.com/uploads/1/3/0/6/130639222/4774022.pdfIn PDF document text
    • http://mlcvideos.com/uploads/1/3/0/6/130603935/zidanamu-temufenakipakar.pdfIn PDF document text
    • http://michaelshusko.com/uploads/1/3/0/3/130379311/04323e74ac64b9.pdfIn PDF document text
    • http://veronikasafarova.com/uploads/1/3/0/5/130590561/01510a.pdfIn PDF document text
    • http://angelcleaningservice.net/uploads/1/3/0/7/130739789/denekovo_kotaror_reduxenozigani_wilelibumiwage.pdfIn PDF document text
    • http://johnbradymd.com/uploads/1/3/0/5/130539696/gafagazikudof_kimidikin.pdfIn PDF document text
    • http://royalglossbrat.com/uploads/1/3/0/7/130776740/vexam_jagot.pdfIn PDF document text
    • http://getnimble.info/uploads/1/3/0/6/130620998/mipuzesutife.pdfIn PDF document text
    • http://meridianscan.com/uploads/1/3/0/6/130604422/mavubug_wowibebowulu_pizup_tinilagugigati.pdfIn PDF document text
    • http://mail.argentaelectronics.com.au/uploads/1/3/0/4/130436108/golibuv_xisatuwedesewir.pdfIn PDF document text
    • http://michael-ortiz-design.com/uploads/1/3/0/7/130739251/lunavunusepi.pdfIn PDF document text
    • http://autodiscover.velasquezmotorsports.com/uploads/1/3/0/6/130639608/4173795.pdfIn PDF document text
    • http://london-office-4.pleasingfood.com/uploads/1/3/0/6/130621406/130621406.html#tell+us+a+little+about+yourself+interview+questionIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000535e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x535E 1708 bytes
SHA-256: 83459e82cebe561b9e65dda6a09953c9e35f75e5df0fa62a624e1833cc5b8086
font_01_sfnt_off00005e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E9B 8340 bytes
SHA-256: 4fab4a6d7f77ebe535480e4bf1fa7b4d3233284b3c58741d05579a17bdf8ef57