Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f60ddc72fca004c…

MALICIOUS

PDF

51.8 KB Created: 2021-06-10 18:30:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 11ce249b56e1eb5b8bf8154e2e53fe84 SHA-1: dc6a9c26c7239c7e28804b75e46c39c6cfd683b4 SHA-256: 3f60ddc72fca004c04e68b7671a5fe2d203c166fc876452d12fcc3fdf2e912e0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a redirector URL, identified as malicious and associated with game hack lures. The document body and heuristics indicate a social engineering tactic to trick users into visiting these links, likely leading to further malicious content or downloads. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9464

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.tw/app/431946152/robux-for-free-app-game-hack In PDF document text
    • http://torkelson.se/images/robux-gratis_GM431946152.pdfIn PDF document text
    • http://torkelson.se/images/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
    • http://torkelson.se/images/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://torkelson.se/images/cute-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://torkelson.se/images/robux-generator-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://torkelson.se/images/coin-master-hack-tool-v1-9-pc_GM406889139.pdfIn PDF document text
    • http://torkelson.se/images/roblox-color-name-hack_GM431946152.pdfIn PDF document text
    • http://torkelson.se/images/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://torkelson.se/images/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://torkelson.se/images/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://torkelson.se/images/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://torkelson.se/images/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdfIn PDF document text
    • http://torkelson.se/images/hacker-hangout-roblox_GM431946152.pdfIn PDF document text
    • http://torkelson.se/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://torkelson.se/images/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://torkelson.se/images/coin-master-mod-version-free-download-2021_GM406889139.pdfIn PDF document text
    • http://torkelson.se/images/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://torkelson.se/images/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://torkelson.se/images/pokemon-go-free-latest-version_GM1094591345.pdfIn PDF document text
    • http://torkelson.se/images/roblox-apocalypse-rising-hack_GM431946152.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_004_off00005313.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5313 25752 bytes
SHA-256: 34f6b5b8aa238140e6b677bb0ad52b6be2e9b2b78809b077d1c2dc8a396323fc
font_01_sfnt_off00008fd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FD5 7420 bytes
SHA-256: 0b188308ab0e7ffce9913d63d697a586f2937cafc51a771db38e3a566cd37e24
font_02_sfnt_off0000a845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA845 18192 bytes
SHA-256: 8b449105c2e46494a6d9f40850319c906693e3742fc6b53296928acea086ed1f

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