Malicious PDF — malware analysis report

Static analysis result for SHA-256 f334083e7d59c656…

MALICIOUS

PDF

33.2 KB Created: 2021-06-20 00:04:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1879bbc348ea88bd858bad55f241caf7 SHA-1: 439ac84638a966e48f33a36052287f9128849fa8 SHA-256: f334083e7d59c656402bc54137c1173deea77d40b30242ed82cfcf7c399350ad
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites that promise free in-game items and hacks, indicating a phishing or scam attempt. The heuristic firings confirm that the PDF links to known malicious redirector infrastructure and is designed as a lure for game-related cheats. The document body, though partially garbled, contains URLs that reinforce this lure.

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/roblox-app-free-robux-game-hack In PDF document text
    • http://www.sovtigaz.ru/f/files/roblox-bee-hive-simulator-how-to-get-a-free-egg_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/script-to-free-objet-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/coin-master-com_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-robux-today_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/cool-skin-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/coin-master-daily-free-spin-and-coin-link-haktuts_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/get-free-robux-generator_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_off00002d6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D6D 21668 bytes
SHA-256: f6b9d860d86a584192dc0267e53b68926d711381fbc2050606a91ad407747e81
font_01_sfnt_off00005cd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD3 18968 bytes
SHA-256: f0626fc3db44f1e7e61dc9513c81725444d887002715e76ccb9a31820bcc294c