Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a4931e25c90a5e4…

MALICIOUS

PDF

42.1 KB Authoring application: Karbon
MD5: e879b0cbbce7873a0059bbbcdb24778b SHA-1: 094e10c8135e72995000bdcf63985bcf8dbdcb01 SHA-256: 9a4931e25c90a5e42967d4acfd114e79959d7238ab56f52ac08a39c3662961f2
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF files, a technique commonly used for SEO poisoning and phishing. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. The document body, though heavily obfuscated, contains references to song lyrics and download prompts, suggesting a lure to trick users into clicking the malicious 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://sawod.gateway-3ds.ru/uploads/2020/01/27/wipodowod_ponanedo.pdf
    • http://audio-start31.icu/uploads/2020/01/28/xawefiwisopovovew.pdf
    • http://marketdota.ru/uploads/2020/01/29/zimumawumutalebufoxi.pdf
    • http://megatest.org/uploads/2020/01/28/nejamugixetuno_gajubowaza_wopetesokegu_towipixakunopik.pdf
    • http://thecvap.org/uploads/1/3/0/6/130604737/9150993.pdf
    • http://apccrc.net/uploads/1/3/0/4/130476751/954ff6a434.pdf
    • http://svobodafond.ru/uploads/2020/01/28/9016006.pdf
    • http://bib.biletkaspitur.online/uploads/2020/01/28/gufixebesawamav.pdf
    • http://kezedik.indasoft.online/uploads/2020/01/28/63dfda297e3656.pdf
    • http://bobu.your-ra.ru/uploads/2020/01/28/kovopanexolowonigax.pdf
    • http://finaferu.blendsa.com/uploads/2020/01/28/folif.pdf
    • http://vkino.fun/uploads/2020/01/28/9222223.pdf
    • http://familyfilecardkeeper.com/uploads/1/3/0/4/130475918/7417283.pdf
    • http://wisdom-olga.ru/uploads/2020/01/29/4738703.pdf
    • http://proceedbydesign.com/uploads/1/3/0/4/130476272/4d5375.pdf
    • http://guzesaze.kvartet-a.ru/uploads/2020/01/27/simadusiluwikejig.pdf
    • https://regixidelikab.weebly.com/uploads/1/3/0/4/130478295/funenewodarejep-gajujipa-pazesoxak-sulafusezadegax.pdf
    • http://trubaok.ru/uploads/2020/01/27/lomapixajomunebutej.pdf
    • https://melerixezube.weebly.com/uploads/1/3/0/4/130435596/ef843238af.pdf
    • http://lapube.relampagomagalu.com/uploads/2020/01/28/784855.pdf
    • http://destinationweddingsbigisland.com/uploads/1/3/0/6/130603965/130603965.html#lirik+can%27t+take+my+eyes+off+you+mp3

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000015b6.bin
957c8fb930c19f0a4578d488f30c23680c22a25276cbf554d005bde2b4026d92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15B6 8024 bytes
font_01_sfnt_off00005b15.bin
2cdbb021946863abefcea69c147ecba1deb91015bdcbfab198bfb9b45e854878		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B15 16540 bytes

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