Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca22cbc3602a545c…

MALICIOUS

PDF

191.7 KB Created: 2018-04-25 16:44:14 +03:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4986f276e4f06e5bb659de17ab2da872 SHA-1: cc5546653202c319835c69837c4dfdcaf88d4316 SHA-256: ca22cbc3602a545c993a209ac2a6d209651107b96f7f5b3693f79fae71108e28
64 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

Heuristics 3

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. 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%B3%D0%B4%D0%B7+7+%D0%BA%D0%BB%D0%B0%D1%81%D1%81+%D1%83%D0%BA%D1%80+%D0%BC%D0%BE%D0%B2%D0%B0+%D1%81+%D1%8F+%D1%94%D1%80%D0%BC%D0%BE%D0%BB%D0%B5%D0%BD%D0%BA%D0%BE+%D0%B2+%D1%82+%D1%81%D0%B8%D1%87%D0%BE%D0%B2%D0%B0 PDF link annotation
    • https://manryleramb1975.files.wordpress.com/2018/04/dezedaxadaj-gotovye-domashnie-zadaniia-po-matematike-6-klass-bunimovich-141-str-firelujosa.pdfIn PDF document text
    • https://movilsicu1987.files.wordpress.com/2018/04/pewufuwolove-natsionalnoe-rukovodstvo-po-gastroenterologii-kupit-gosukibemaxago.pdfIn PDF document text
    • https://pupmerobesch1984.files.wordpress.com/2018/04/vagediw-miller-aleksei-borisovich-biografiia-semia-wupefenixa.pdfIn PDF document text
    • https://cianahaskio1976.files.wordpress.com/2018/04/xakiga-gdz-algebra-7-klass-632-venig.pdfIn PDF document text
    • https://kaipinare1974.files.wordpress.com/2018/04/rixataxofatunof-milgamma-instruktsiia-po-primeneniiu-ukoly-vnutrimyshechno-tsena-vomev.pdfIn PDF document text
    • https://natejuggnber1976.files.wordpress.com/2018/04/lefudakosol-zadaniia-s5-v-ege-2015-po-khimii-jutiworezetelo.pdfIn PDF document text
    • https://img0.liveinternet.ru/images/attach/d/0//5908/5908496_gurudgeografiiaprofilnyiegefizib.pdfIn PDF document text
    • https://prupaqrestio1977.files.wordpress.com/2018/04/nubusazaveb-skachat-besplatno-pesni-petliury-remiks-sududono.pdfIn PDF document text
    • https://img0.liveinternet.ru/images/attach/d/0//5906/5906295_sewamreshebnikpoalgebremordkovich10klassprofilnyiurovengofeto.pdfIn PDF document text
    • https://img1.liveinternet.ru/images/attach/d/0//5909/5909692_jasasekakposmotretotsenkiegepopasportnymdannymlulis.pdfIn PDF document text
    • https://boitididen1985.files.wordpress.com/2018/04/wawomaniz-kniga-po-geografii-7-klass-pestushko-bodetimoki.pdfIn PDF document text
    • https://img1.liveinternet.ru/images/attach/d/0//5909/5909202_sobgdzpomatematike3klassrudnitskaiauchebnik1chastotvetyjib.pdfIn PDF document text
    • https://golddocklange1971.files.wordpress.com/2018/04/lirokatigusoji-vvod-novogo-uchastnika-i-smena-direktora-v-ooo-poshagovaia-instruktsiia-2016-zudikopak.pdfIn PDF document text
    • https://krisaradre1989.files.wordpress.com/2018/04/tapakulem-skachat-logo-dlia-kss-v-34-mozogiruwulifev.pdfIn PDF document text
    • https://zdajicparvio1983.files.wordpress.com/2018/04/kevogutabako-chity-eu4-biwogavinowagez.pdfIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000a49f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA49F 1485561 bytes
SHA-256: 1718db8b7c6a44712dc1b3acee434281abf7527ebf6ea299260c2277eb5af585