Malicious PDF — malware analysis report

Static analysis result for SHA-256 421afb3fd43bb13f…

MALICIOUS

PDF

49.9 KB Created: 2021-06-02 17:05:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cded23c531e8d7c7c33f6662567dc9bd SHA-1: 21f8a5b005df07b301d1502bcd288912fde986b6 SHA-256: 421afb3fd43bb13fc881768fddc9a593879e7ca2368320f46623c9efcb9776c5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and infrastructure, specifically promoting 'game hacks' and 'robux generators'. The document body and extracted URLs strongly suggest a phishing or malware distribution lure, likely intended to trick users into downloading further malicious content or visiting compromised sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/431946152/roblox-robux-hacks-2021-game-hack In PDF document text
    • http://precisionheavyhaul.com/images/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/minecraft-client_GM479516143.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/free-robux-hack-generator_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/pokemon-go-free-download-apk_GM1094591345.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/coin-master-cheat-codes-free_GM406889139.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/free-tiktok-fans-no-verification_GM835599320.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/coun-master_GM406889139.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/avatar-de-roblox_GM431946152.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/free-promo-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/coin-master-free-download-for-pc_GM406889139.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/minecraft-free-download_GM479516143.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/pokemon-go-free-unblocked_GM1094591345.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_off00005023.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5023 28436 bytes
SHA-256: 5dd458745f565ede99b1ebc931845de835df237da411b46315c5999b04be1bc4
font_01_sfnt_off000091b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91B0 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EC2 18724 bytes
SHA-256: b0628cbfbadd951a24a6920cbffc516042b1d9ec0875de45792b98499c757c22

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