Malicious PDF — malware analysis report

Static analysis result for SHA-256 67dbad1e177e0f44…

MALICIOUS

PDF

47.3 KB Created: 2021-06-03 07:04:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 6f1aec3b58b42e9194ebd1ba8a741861 SHA-1: d5834c05613a093b636140fee7f1959bd3ff5555 SHA-256: 67dbad1e177e0f444447b12de26277fce08e7cc763a91efd8db04668439bebb0
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to known malicious redirector infrastructure, designed to lure users into downloading potentially harmful content. The document body and embedded links suggest a scam related to game hacks and in-game currency. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

Heuristics 5

  • 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.
  • 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.
  • 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.online/app/479516143/minecraft-xbox-one-free-game-hack In PDF document text
    • http://library.polita.ac.id/repository/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://library.polita.ac.id/repository/how-to-play-coin-master_GM406889139.pdfIn PDF document text
    • http://library.polita.ac.id/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.polita.ac.id/repository/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://library.polita.ac.id/repository/coin-master-free-in-app-purchases_GM406889139.pdfIn PDF document text
    • http://library.polita.ac.id/repository/roblox-hacks-for-mac_GM431946152.pdfIn PDF document text
    • http://library.polita.ac.id/repository/pubg-uc-or-g_GM1330123889.pdfIn PDF document text
    • http://library.polita.ac.id/repository/all-coin-master-spin-link-and-free-download_GM406889139.pdfIn PDF document text
    • http://library.polita.ac.id/repository/cute-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.polita.ac.id/repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://library.polita.ac.id/repository/coin-master-hack-facebook_GM406889139.pdfIn PDF document text
    • http://library.polita.ac.id/repository/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://library.polita.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.polita.ac.id/repository/online-hacking-tricks-coin-master_GM406889139.pdfIn PDF document text
    • http://library.polita.ac.id/repository/how-to-make-a-minecraft-java-server-for-free_GM479516143.pdfIn PDF document text
    • http://library.polita.ac.id/repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://library.polita.ac.id/repository/coin-master-hack-apk-with-fb-login-2021_GM406889139.pdfIn PDF document text
    • http://library.polita.ac.id/repository/www-free-robux_GM431946152.pdfIn PDF document text
    • http://library.polita.ac.id/repository/coin-master-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://library.polita.ac.id/repository/hack-para-coin-master-sin-verification_GM406889139.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
stream_004_off000054a3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54A3 30860 bytes
SHA-256: 5cf0fa54c6ee5a4d3e20e01c9cec870103c92d1cfdadf9d27bd6e0c770e12051
font_01_sfnt_off00009683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9683 18304 bytes
SHA-256: c1e2eae75883489521c63816ae5be98a5c25b5d6a823037780a07f542a635aab

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