Malicious PDF — malware analysis report

Static analysis result for SHA-256 8829705c1d07ba8c…

MALICIOUS

PDF

33.9 KB Created: 2021-07-04 12:25:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 465f58d18e36bd39a19b9d736ae77593 SHA-1: 4cbcfaf6a1f057b242a81c32bbc5b023791981db SHA-256: 8829705c1d07ba8c3221235537d3d6c8620db074c4f1dc3d3243c655e27eb918
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for free game currency or hacks, directly linking to malicious redirector infrastructure. The primary link identified is http://netcdn.tw/app/431946152/free-robux-live-game-hack, which is flagged as malicious. The document body and embedded URLs reinforce this lure, suggesting a phishing or scam attempt to redirect users to potentially harmful sites.

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.tw/app/431946152/free-robux-live-game-hack In PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-watch-ads-for-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/cheats-for-jailbreak-on-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-roblox-groups-with-funds_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/is-roblox-free-on-the-computer_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/pokemon-go-free-40k_GM1094591345.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/como-hackear-cuentasen-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-a-gamepass-for-free-in-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-boombox-backpack-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-hack-apk-mod_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/ap-get-free-robux-and-tips-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins-reddit_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/obc-free-roblox-account_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-robux-club-in-2021_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_off00002de8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DE8 22416 bytes
SHA-256: 66d4930d43e866d8814065a42c414eaf0eb23ac43f060e211969ddc5bea8a5ac
font_01_sfnt_off00005fce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCE 18952 bytes
SHA-256: d22dcf80f41983911a212d4acfd48803d5c09337ade448c07c06130db19206b8

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