Malicious PDF — malware analysis report

Static analysis result for SHA-256 5696a9ddb7612617…

MALICIOUS

PDF

34.7 KB Created: 2021-06-26 20:51:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 498e3243a8966a01717d5d7ff59cb091 SHA-1: f97c436f666aac439302811f63e7b82648f27e7e SHA-256: 5696a9ddb7612617d82fd3e090897f45491ccfcbeeb3c5f2d70f94aabd7111c8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game hacks and currency to entice users into clicking a link. The primary link directs to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or downloads. The document's content and embedded URLs strongly suggest a phishing or scam campaign aimed at users seeking in-game advantages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.co/app/431946152/how-to-get-free-private-server-roblox-game-hack In PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/roblox-install-free_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/coin-master-free-spins-2021-blogspot_GM406889139.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/play-roblox-free-online_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/how-to-get-free-items-on-roblox_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/minecraft-mod-menu_GM479516143.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/free-robux-reddit_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/can-you-ever-get-free-robux_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/free-old-roblox-account-generator-2021_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/play-roblox-bloxburg-for-free_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/minecraft-pocket-edition-free-apk_GM479516143.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/hack-para-roblox-hack-exploit_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/hack-coin-master-1_GM406889139.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/impulse-hack-roblox_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/free-robux-games_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/pop-slots-free-vegas-casino-slot-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/minecraft-java-edition-free-trial_GM479516143.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_off0000305d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x305D 22228 bytes
SHA-256: 77cdb7722225439a060dd6b15aa6aec5b78377907a4100a2d3ffdc2e628de4ee
font_01_sfnt_off000061c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C5 19304 bytes
SHA-256: 0875ebbe8529148962febdf88ff1f75fbeedc4cec5fb65d160205138da61abe0