Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0ffd443b42b3f25…

MALICIOUS

PDF

44.4 KB Created: 2021-06-11 02:52:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 60d43601d684200ba0d357a9d75e3143 SHA-1: 869017b3251b1ba64581955693dc9abb6508a5bb SHA-256: f0ffd443b42b3f256651fa5895b486eca801b2ff9c95bb72260998f1bbe0dcb2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as "free generator / game hack" lures. The document body and embedded URLs strongly suggest a phishing or scam attempt to trick users into visiting malicious sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/roblox-free-robux-enter-password-game-hack In PDF document text
    • http://algierimasonry.com/images/free-robux-working_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/robux-boost_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/minecraft-cheats-switch_GM479516143.pdfIn PDF document text
    • http://algierimasonry.com/images/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/coin-master-on-facebook_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/how-do-you-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://algierimasonry.com/images/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/ispoofer-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • http://algierimasonry.com/images/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/50-free-tiktok-likes-trial_GM835599320.pdfIn PDF document text
    • http://algierimasonry.com/images/how-to-get-a-free-raid-pass_GM1094591345.pdfIn PDF document text
    • http://algierimasonry.com/images/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://algierimasonry.com/images/free-robux-codes-generator-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/free-minecraft-coloring-pages_GM479516143.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_off00004efc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EFC 25008 bytes
SHA-256: e0381d3de040dc39085a09a275ee2948a877660e2a1cadcbb12c54153439705d
font_01_sfnt_off000088c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88C3 18912 bytes
SHA-256: f20433b7338b7ea7e5cb02c797d2cec0cf650f08df7f791b9d8d5b228262efc1

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