Malicious PDF — malware analysis report

Static analysis result for SHA-256 51c1c468107ec687…

MALICIOUS

PDF

44.2 KB Created: 2021-05-13 21:39:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 2fcc93bfc3afb8e9ab6275ee4ce6bbe9 SHA-1: fcb3377e34ba49911708f59d7d9fd0941cabda4c SHA-256: 51c1c468107ec687833f1bc8fa503f1fd02304a6865343d9b7a239ee6e16905d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites that are flagged as malicious redirectors, specifically promoting "game hacks" and "free generators." The document body, though partially corrupted, contains references to "Robux 2021" and a URL consistent with the malicious findings. The presence of these lures and redirectors strongly suggests a phishing or scam campaign aimed at tricking users into visiting potentially harmful sites.

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 https://netcdn.xyz/app/431946152/robux-2021-game-hack In PDF document text
    • https://hassel-event.de/images/worst-client_GM479516143.pdfIn PDF document text
    • https://hassel-event.de/images/coin-master-hack-quora_GM406889139.pdfIn PDF document text
    • https://hassel-event.de/images/free-minecraft-account-and-password-generator_GM479516143.pdfIn PDF document text
    • https://hassel-event.de/images/robloxfun-com-robux_GM431946152.pdfIn PDF document text
    • https://hassel-event.de/images/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://hassel-event.de/images/minecraft-116-apk-download_GM479516143.pdfIn PDF document text
    • https://hassel-event.de/images/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://hassel-event.de/images/coin-master-link-daily-get-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://hassel-event.de/images/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://hassel-event.de/images/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • https://hassel-event.de/images/coin-master-hackcom-xyz_GM406889139.pdfIn PDF document text
    • https://hassel-event.de/images/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • https://hassel-event.de/images/free-robux-mod_GM431946152.pdfIn PDF document text
    • https://hassel-event.de/images/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://hassel-event.de/images/claimrobux-net_GM431946152.pdfIn PDF document text
    • https://hassel-event.de/images/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • https://hassel-event.de/images/coin-master-free-coins-and-spins-daily-summary_GM406889139.pdfIn PDF document text
    • https://hassel-event.de/images/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://hassel-event.de/images/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://hassel-event.de/images/www-roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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
font_00_sfnt_off00004867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4867 29372 bytes
SHA-256: 34c425eaf925d05989b320609537b21b54f3237c5327a2fedf01b04c1df2b605
font_01_sfnt_off00008aa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA9 18252 bytes
SHA-256: f22572533f4e8da48e03a48f0d29ce3544a01a0bd2cb3d9374f1b8b189e2707b

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