Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b3b532fe4f0918e…

MALICIOUS

PDF

181.3 KB Created: 2018-04-25 17:19:55 +03:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 15389903b074c74a4fd62aa0c266905e SHA-1: 63d8155e18adb2707afbc86b77f8a3ee66123f02 SHA-256: 4b3b532fe4f0918e309a3c76318f170f7f0cf663d8d06f2e9f892716d02cdc8e
84 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is identified as malicious due to its structure, which resembles a screenshot lure designed to trick users into clicking a link. The embedded URL 'http://renimba.info/wp1?keyword=attack+on+titan+cracks' is a primary indicator of malicious intent, likely leading to a phishing page or malware download. The ML classifier also flagged this PDF with a high probability of being malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8691

Heuristics 4

  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 2 image(s), only 0 text block(s), carries a click-outward action, and is only 181 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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=attack+on+titan+cracks PDF link annotation
    • https://glutirtanria1971.files.wordpress.com/2018/04/labonipob-skina-mainkraft-pe-gogus.pdfIn PDF document text
    • https://spattamati1988.files.wordpress.com/2018/04/dupugu-bliuda-iz-oleniny-v-multivarke-retsepty-s-foto-xetodel.pdfIn PDF document text
    • https://idemungrin1974.files.wordpress.com/2018/04/tedasen-skachat-pesniu-kruga-magadan-besplatno-jesukewapopur.pdfIn PDF document text
    • https://unkonebac1973.files.wordpress.com/2018/04/sazapevobejoked-gdz-po-angliiskomu-4-klass-kuzovliov-peregudova-duvanova-strelnikova-zisuw.pdfIn PDF document text
    • https://fettimicut1978.files.wordpress.com/2018/04/bosuni-obratnyi-osmos-novaia-voda-instruktsiia-kivakijoruzat.pdfIn PDF document text
    • https://brewerkidtuo1989.files.wordpress.com/2018/04/jujufad-skhema-metro-novosibirsk-v-budushchem-tutug.pdfIn PDF document text
    • https://img1.liveinternet.ru/images/attach/d/0//5909/5909906_pagevigdzenjoyenglish3klassrabochaiatetradbiboletovajij.pdfIn PDF document text
    • https://gereterfgo1983.files.wordpress.com/2018/04/joligulojazuxar-lok-dog-fonari-skachat-gonejifu.pdfIn PDF document text
    • https://img1.liveinternet.ru/images/attach/d/0//5909/5909414_nanewkogdapridutrezultatyegepoprofilnoimatematikerof.pdfIn PDF document text
    • https://fettimicut1978.files.wordpress.com/2018/04/nupij-marshak-plyvet-plyvet-korablik-soderzhanie-woneses.pdfIn PDF document text
    • https://soareconpunc1988.files.wordpress.com/2018/04/kexizafozid-programma-fsviewer-skachat-besplatno-nubanerogamu.pdfIn PDF document text
    • https://freepeginpi1984.files.wordpress.com/2018/04/zanagakuki-reshebnik-po-russkomu-iazyku-5-klass-kupalova-eremeeva-tisopon.pdfIn PDF document text
    • https://img0.liveinternet.ru/images/attach/d/0//5910/5910925_wilgdzmatematika4klassbogdanovichreshebnik2004godaxan.pdfIn PDF document text
    • https://img1.liveinternet.ru/images/attach/d/0//5909/5909214_zukekugdzpogeometriiza10klassatanasian2014batuga.pdfIn PDF document text
    • https://img0.liveinternet.ru/images/attach/d/0//5906/5906335_zozewgdzporusskomuiazyku6klasslvovalvov572gujomim.pdfIn 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_off0000a471.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA471 1485561 bytes
SHA-256: 1718db8b7c6a44712dc1b3acee434281abf7527ebf6ea299260c2277eb5af585
font_00_sfnt_off000293f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x293F4 17176 bytes
SHA-256: 132eedda1d822def8533e23f780f8a214215547c88a0814711b9752704699c07
font_01_sfnt_off0002b8a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B8A7 14316 bytes
SHA-256: 50205b768f1b646d172a772a9637c9462f5c5c52c0495ac159b6a71ed8493953

Open this report in the interactive analyzer, or submit your own file for analysis.