Malicious PDF — malware analysis report

Static analysis result for SHA-256 acaf4f26c704ddb8…

MALICIOUS

PDF

45.3 KB Created: 2021-06-09 10:59:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e1cf0ac716dc30ef603143133565cc02 SHA-1: b65e54ae7f208b109f04c00cf6ccc532d10768d5 SHA-256: acaf4f26c704ddb8fce3ec77f9394b8815ecab57988b40ecc7743c4b469d44f2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The primary link, https://netcdn.tw/app/431946152/how-to-hack-free-robux-on-pc-game-hack, is flagged as a known malicious redirector. The document body, though partially corrupted, contains similar lure text and URLs, reinforcing the phishing and redirection attempt. No scripts were extracted, but the embedded URLs and heuristic firings strongly indicate a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/how-to-hack-free-robux-on-pc-game-hack In PDF document text
    • http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/roblox-base-wars-hack-god-mode_GM431946152.pdfIn PDF document text
    • http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/rbc-points-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/free-good-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/mobi-hack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/be-hacks-to-use-for-no-clipping-in-roblox_GM431946152.pdfIn PDF document text
    • http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/pagina-de-hack-para-robux-gratis_GM431946152.pdfIn PDF document text
    • http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/youtube-simulator-hack-roblox_GM431946152.pdfIn PDF document text
    • http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/free-russian-sign-roblox-t-shirt_GM431946152.pdfIn PDF document text
    • http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/roblox-free-cat-tail_GM431946152.pdfIn PDF document text
    • http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/how-to-make-your-own-game-whith-free-robux_GM431946152.pdfIn PDF document text
    • http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/how-to-hack-onto-someone-elses-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/i-hacked-this-person-on-roblox_GM431946152.pdfIn PDF document text
    • http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/omg-insane-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/is-minecraft-free-on-pc_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_off000053d5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53D5 25676 bytes
SHA-256: af2b5b2f7cf25a18374796983361f68a6ff1a3750ad4a96e9c92d093ab9c18ac
font_01_sfnt_off00008d5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D5E 18728 bytes
SHA-256: 62012190a44667555fddc1d607970c271a4d07cc34cc43a175318bd6432543fc

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