Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a9e86091a1ad99e…

MALICIOUS

PDF

35.8 KB Created: 2021-07-06 03:51:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4facad13320402c9a9f90b377a401fbb SHA-1: ab497195daa7dbbdbfcff5a7ad938cc5d027bd32 SHA-256: 6a9e86091a1ad99ee3ecc8655fdb7ab99d0fa0d30aba680dffe2d9d9415e3677
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document employs a lure related to game hacks and generators, directing users to external URLs. The presence of numerous linked PDF files on 'sonestad.se' suggests a link farm or SEO manipulation tactic. The ML classifier strongly indicates malicious intent, likely to drive traffic or potentially deliver further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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
  • 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://netcdn.tw/app/479516143/minecraft-hacks-xbox-game-hack PDF link annotation
    • https://www.sonestad.se/library/repository/coin-master-game-hack-apk_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-robux-jenerador_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/sten-gun-bad-business-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/hack-coin-master-8-ball-pool_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-roblox-pin-codes_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-game-packs-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-to-watch-ads-for-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/oprewards-com-earn_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-free-spins-11-01-2021_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/i-need-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/can-i-have-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-pe_GM479516143.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-hack-apk-app_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-free-spins-twitter_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/100-free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/roblox-weird_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3235 23724 bytes
SHA-256: cc60342d3019bede3b6f24acd299a42fca06d30fb0a80c1feb58ec8175bbcde7
font_01_sfnt_off000067dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67DD 18764 bytes
SHA-256: fac271e589278c8c4157923416e56fc6fead81bad552b20bddbb50dc0ef56938

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