Malicious PDF — malware analysis report

Static analysis result for SHA-256 a342cf17abb798f7…

MALICIOUS

PDF

34.0 KB Created: 2021-06-26 12:43:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bac806c1682bfaa6c25d7863b0ba33ea SHA-1: a73f1c5e827406942b8cafeedcdd5b597a194736 SHA-256: a342cf17abb798f71dff9768561eef7da989de3ec6a8579c4d63633f0e435b4c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector, that promise free Robux or game hacks. The document body explicitly mentions "Free Robux Giveaway Live Right Now" and "CLICK HERE TO ACCESS ROBUX GENERATOR", indicating a social engineering lure. The ML classifier also flagged this PDF with high confidence, supporting the malicious classification.

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/free-robux-giveaway-live-right-now-game-hack In PDF document text
    • https://kldcardio.ru/images/robux-free-clothes_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/how-to-get-minecraft-for-free-on-android-device_GM479516143.pdfIn PDF document text
    • https://kldcardio.ru/images/roblox-hack-free-robux-website_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/free-robux-free-real_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/free-robux-games_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/tiktok-bots-free_GM835599320.pdfIn PDF document text
    • https://kldcardio.ru/images/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/free-robux-promo-codes-2021-not-expired-november_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/enter-this-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/free-robux-reeddeem-code_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/pastebm-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/roblox-free-noob-outfits_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/create-a-audio-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/free-gift-cards-cods-for-roblox_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/impact-minecraft-hack_GM479516143.pdfIn PDF document text
    • https://kldcardio.ru/images/hilton-hotels-roblox-hack_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/cheat-engine-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/how-to-hack-on-roblox-rap-battles_GM431946152.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
font_00_sfnt_off00002de2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DE2 21792 bytes
SHA-256: b305edabf9945bcb92603d9b68646a18773417a39b85837214ceecf9247d7e79
font_01_sfnt_off00005e1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E1E 19564 bytes
SHA-256: 2c13a6b7efd55192fb3488bb8496acbd6429c5c5b122a06273e232a49d1b47fd

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