Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ce86f39c04f9d5d…

MALICIOUS

PDF

34.3 KB Created: 2021-06-18 18:01:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e0ef85f04895cba544d5e175dbf42485 SHA-1: 981e7e63d4dc9f911451bd8e64dbbb83c2da26ae SHA-256: 3ce86f39c04f9d5d6ef1dfd26fabc72adf3941aaf1c565486c2f51f4d827014c
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document employs a game hack lure to entice users into clicking malicious links. The primary link redirects to a page that appears to be a link farm, hosting numerous other PDF files, likely to distribute further malware or generate ad revenue. The ML classifier strongly indicated maliciousness, and the PDF structure contains a mass of external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/431946152/5-morph-to-look-like-a-hacker-in-roblox-game-hack PDF link annotation
    • http://www.sovtigaz.ru/f/files/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/roblox-free-roblox-card-codes_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/coin-master-free-spin-and-trading_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/coin-master-apk-hack-32_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/minecraft-online-free-download_GM479516143.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/coin-master-daily-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-roblox-card-codes_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/get-free-hero-animation-roblox_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-robux-co_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/need-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/roblox-free-avatar-drawing_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-look-awesome-in-roblox-for-free_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_off00002e6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E6F 22208 bytes
SHA-256: 3d0b0da1825b90ab2eea95f1070a79ec9803a8e7a3fbf1ff8962de7600eacf91
font_01_sfnt_off00005fe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE8 19448 bytes
SHA-256: 1b4334899ed1b16eeadff1fe404df97ca7a14cab27c1be1f61dc614040c7fd2d