Malicious PDF — malware analysis report

Static analysis result for SHA-256 691b4f582dac08ab…

MALICIOUS

PDF

35.4 KB Created: 2021-06-19 17:31:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 25729655878a402d9369261cecad2f68 SHA-1: 0c71c891a79e83a3395c357c6141b9502706fcb8 SHA-256: 691b4f582dac08aba1a5054a42607a6f4ba2d8479012587c091657b82520a15d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs disguised as links to game hacks and generators, such as 'how-to-get-free-robux-on-ipad-2021-game-hack'. These links lead to malicious redirectors, indicating a phishing or scam attempt. The presence of these lures and the ML classifier's high confidence score support this assessment.

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.co/app/431946152/how-to-get-free-robux-on-ipad-2021-game-hack In PDF document text
    • http://xn--apartementos-smfora-cala-ratjada-4vc.de/images/roblox-cheat-engine-2021-download_GM431946152.pdfIn PDF document text
    • http://xn--apartementos-smfora-cala-ratjada-4vc.de/images/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://xn--apartementos-smfora-cala-ratjada-4vc.de/images/freer-pro-tiktok_GM835599320.pdfIn PDF document text
    • http://xn--apartementos-smfora-cala-ratjada-4vc.de/images/minecraft-windows-10-edition-free_GM479516143.pdfIn PDF document text
    • http://xn--apartementos-smfora-cala-ratjada-4vc.de/images/roblox-fly-hack-download-free_GM431946152.pdfIn PDF document text
    • http://xn--apartementos-smfora-cala-ratjada-4vc.de/images/on-builders-club-can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://xn--apartementos-smfora-cala-ratjada-4vc.de/images/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • http://xn--apartementos-smfora-cala-ratjada-4vc.de/images/coin-master-free_GM406889139.pdfIn PDF document text
    • http://xn--apartementos-smfora-cala-ratjada-4vc.de/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://xn--apartementos-smfora-cala-ratjada-4vc.de/images/roblox-free-name-change-hack_GM431946152.pdfIn PDF document text
    • http://xn--apartementos-smfora-cala-ratjada-4vc.de/images/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://xn--apartementos-smfora-cala-ratjada-4vc.de/images/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://xn--apartementos-smfora-cala-ratjada-4vc.de/images/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • http://xn--apartementos-smfora-cala-ratjada-4vc.de/images/coin-master-hack-version_GM406889139.pdfIn PDF document text
    • http://xn--apartementos-smfora-cala-ratjada-4vc.de/images/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://xn--apartementos-smfora-cala-ratjada-4vc.de/images/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://xn--apartementos-smfora-cala-ratjada-4vc.de/images/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://xn--apartementos-smfora-cala-ratjada-4vc.de/images/el-mejore-hack-de-roblox-marzo_GM431946152.pdfIn PDF document text
    • http://xn--apartementos-smfora-cala-ratjada-4vc.de/images/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://xn--apartementos-smfora-cala-ratjada-4vc.de/images/robux-apk_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002f6b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F6B 23000 bytes
SHA-256: 00a4a069e06e928d83be7af2261b2a6b0a0281cdb8cc6b3e15e68251e9a346d3
font_01_sfnt_off00006301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6301 19736 bytes
SHA-256: 675e5621bdd1279e92cec5a095c06550a6ce086cfd236dda8ee411d4ba30a412

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