Malicious PDF — malware analysis report

Static analysis result for SHA-256 a283c076e4a2e05d…

MALICIOUS

PDF

50.1 KB Created: 2021-05-12 11:04:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 93c2ae23fa813570cccc8e15d62fed62 SHA-1: df3bb317e64205765281cc716f129e15bb4f752e SHA-256: a283c076e4a2e05d3ee187585def9a8f65690a6638f4d590a096cd371684a88f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'game hacks' and 'free currency' to lure victims. The document body, though partially corrupted, contains similar URLs and text related to these lures. The presence of these links and the heuristic firings strongly indicate a phishing or scam attempt designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8594

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 https://netcdn.xyz/app/406889139/mcpe-master-coins-hack-game-hack In PDF document text
    • http://whiteyaknepal.com/userfiles/files/games-like-minecraft-but-free_GM479516143.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/robux-free-c_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/coin-master-download_GM406889139.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/get-free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/free-robux-link_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/coin-master-card-hack-apk_GM406889139.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/get-free-roblox_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/make-your-own-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b33.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B33 24708 bytes
SHA-256: 336fd60b5a83c2e3f7d93d406d164c873b8d89a1f10e6032e8b7eb198c99d373
font_01_sfnt_off000083d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83D4 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008db9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DB9 8676 bytes
SHA-256: e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
font_03_sfnt_off0000a244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA244 17892 bytes
SHA-256: d01168f9bbbfe6455f8e766ddb511a9b706125e6492a8429ac9dad2f06419671