Malicious PDF — malware analysis report

Static analysis result for SHA-256 a73f9941f8de7643…

MALICIOUS

PDF

44.3 KB Created: 2021-06-07 14:46:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7aa48a9e41a93786d80d80d0cec627b6 SHA-1: 113115f696bd17760455ccb36c121bfecb98c3ba SHA-256: a73f9941f8de76431792a4e7c484d109421e42df01a8f5f696c07d973f2a4005
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack lure, linking to known malicious redirector infrastructure. The document body, though partially corrupted, contains references to 'Robux Hack With Phone Number' and embedded URLs that further support the lure. The presence of embedded URLs and the nature of the lure suggest an attempt to redirect users to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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-hack-with-phone-number-game-hack In PDF document text
    • http://precisionheavyhaul.com/images/https-rbx-place-rewards_GM431946152.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/coin-master-free-chest-link_GM406889139.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/minecraft-free-android_GM479516143.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/abd-roblox_GM431946152.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/install-coin-master_GM406889139.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/hack-coin-master-using-cheat-engine_GM406889139.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/coins-master-hacks_GM406889139.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/oprewards-points-generator_GM431946152.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/coin-master-hack-pro-gamers-com_GM406889139.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/mcpe-master-hack-unlimited-coins_GM406889139.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/free-robux-com_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
stream_004_off00004d56.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D56 25496 bytes
SHA-256: 6f225026c6f26a7cc395cfdaffa55343e98750b1ecb04f7626cdeb6cdd78f887
font_01_sfnt_off000087b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87B4 19252 bytes
SHA-256: 56a6e18ebe936e9d13ca57e41c6a7679993b91a76588c60877404057da3bc94a

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