Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3b5988cfeb37690…

MALICIOUS

PDF

213.5 KB Created: 2018-04-25 18:20:57 +03:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 706421562f12c7d7b34e4864ead3378a SHA-1: 136890412d5a1bdcca255c6a36c9aa8e26980e79 SHA-256: d3b5988cfeb37690836d58a9dd08b919d2e499de616ce66ec58e5fbda0c3b923
64 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites advertising cracked software, indicating a lure for potentially malicious content. The ML classifier also flagged the PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the heuristic firings strongly suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7263

Heuristics 3

  • PDF link farm advertises cracked/pirated software medium PDF_CRACKED_SOFTWARE_LURE
    PDF contains many clickable links whose targets use cracked-software, keygen, serial-key, or warez vocabulary. These are SEO-spam lure documents that rank for software-piracy searches and route users to fake 'crack' download pages distributing potentially-unwanted programs, adware, or droppers. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://renimba.info/wp1?keyword=%D0%BC%D0%B0%D1%82%D0%B5%D0%BC%D0%B0%D1%82%D0%B8%D0%BA%D0%B0+6+%D0%BA%D0%BB%D0%B0%D1%81%D1%81+%D0%BA%D0%BE%D0%B7%D0%BB%D0%BE%D0%B2%D0%B0+%D1%80%D1%83%D0%B1%D0%B8%D0%BD+2+%D1%87%D0%B0%D1%81%D1%82%D1%8C PDF link annotation
    • https://stanwymilynn1983.files.wordpress.com/2018/04/sedivesiw-pesniary-albomy-torrent-fobikevowobijaw.pdfIn PDF document text
    • https://dersraposgue1981.files.wordpress.com/2018/04/pogemagakeruva-andrei-velichko-audiokniga-skachat-torrent-niguk.pdfIn PDF document text
    • https://img1.liveinternet.ru/images/attach/d/0//5913/5913275_xojegeinformatika2016zadanie14videosufijet.pdfIn PDF document text
    • https://img0.liveinternet.ru/images/attach/d/0//5906/5906832_xumavreshebnikdpa2016matematika4klasskegu.pdfIn PDF document text
    • https://inpetfipen1982.files.wordpress.com/2018/04/wugiwamem-futszianskaia-kukhnia-retsepty-fivadudibeligi.pdfIn PDF document text
    • https://killhinlikid1987.files.wordpress.com/2018/04/nafoduvabov-russkii-iazyk-dlia-windows-7-skachat-besplatno-letijutipamesa.pdfIn PDF document text
    • https://img0.liveinternet.ru/images/attach/d/0//5906/5906716_wefaxmatematikaege2015260315dosrochnyiobrazetsvariantreshenierib.pdfIn PDF document text
    • https://inpetfipen1982.files.wordpress.com/2018/04/bipugured-powerpoint-skachat-besplatno-dlia-windows-7-russkaia-versiia-torrent-garajabubug.pdfIn PDF document text
    • https://sappbankpharluft1977.files.wordpress.com/2018/04/zuxegirozeserak-obrazets-zapolneniia-tablitsy-5-k-poiasnitelnoi-zapiske-za-2016-god-jezopamozivub.pdfIn PDF document text
    • https://img1.liveinternet.ru/images/attach/d/0//5913/5913202_mufegdzukrainskii1011klassvuk.pdfIn PDF document text
    • https://img0.liveinternet.ru/images/attach/d/0//5910/5910294_sebtemyegematematika2016jobal.pdfIn PDF document text
    • https://trisyxagid1987.files.wordpress.com/2018/04/suzilix-shablon-afishi-dlia-fotoshopa-skachat-terit.pdfIn PDF document text
    • https://emclenorpor1977.files.wordpress.com/2018/04/fitukulifedin-skachat-tekstury-mashin-dlia-sampa-tujix.pdfIn PDF document text
    • https://glutirtanria1971.files.wordpress.com/2018/04/gewadoloru-prikaz-ob-utverzhdenii-raspisaniia-ege-v-2017-godu-zilelofekatogaj.pdfIn PDF document text
    • https://img1.liveinternet.ru/images/attach/d/0//5913/5913486_loxesosbornikzadachpoalgebre9klasskuznetsovasodaj.pdfIn PDF document text
    • https://sappbankpharluft1977.files.wordpress.com/2018/04/zuxegirozeserak-obrazets-zapolneniia-tablitsy-5-k-poiasnitelnoi-zapiske-za-2016-god-In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000a495.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA495 1485561 bytes
SHA-256: 1718db8b7c6a44712dc1b3acee434281abf7527ebf6ea299260c2277eb5af585
font_00_sfnt_off0002eb99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EB99 32552 bytes
SHA-256: efb46504e05e16ab311e153e7a709c6b31771122ea768aa6442ccb5def391d7a
font_01_sfnt_off0003345d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3345D 15644 bytes
SHA-256: 5f25463ed11dd6e9de4a332c48f4461ac60d42285d9a18d88dfcc6965265f237

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