Malicious PDF — malware analysis report

Static analysis result for SHA-256 323f46ce41efc167…

MALICIOUS

PDF

43.3 KB Created: 2021-05-18 00:06:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: eff54d2ca56b6e58f3a6c9f3cb8ca0f8 SHA-1: 2dc57e33e0b4216b32ee4cbbb2912623f9e4b8d0 SHA-256: 323f46ce41efc167d53058d5360bc161e0404609f004722eac0a1d4a4d816c7a
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links designed as lures for free in-game items and hacks, redirecting to known malicious infrastructure. The document body and embedded URLs indicate a scam aimed at tricking users into visiting potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not 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/rbxoffer-com-free-robux-game-hack In PDF document text
    • https://www.dossiermedicina.it/images/coin-master-gold-cards-free-2021_GM406889139.pdfIn PDF document text
    • https://www.dossiermedicina.it/images/httpswwwurcouponsdealcom202103coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • https://www.dossiermedicina.it/images/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://www.dossiermedicina.it/images/www-coin-master_GM406889139.pdfIn PDF document text
    • https://www.dossiermedicina.it/images/daily-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.dossiermedicina.it/images/coin-master-get-free-spins_GM406889139.pdfIn PDF document text
    • https://www.dossiermedicina.it/images/coin-master-free-foxy-food_GM406889139.pdfIn PDF document text
    • https://www.dossiermedicina.it/images/pig-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://www.dossiermedicina.it/images/minecraft-apk-android-free_GM479516143.pdfIn PDF document text
    • https://www.dossiermedicina.it/images/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • https://www.dossiermedicina.it/images/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • https://www.dossiermedicina.it/images/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • https://www.dossiermedicina.it/images/download-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://www.dossiermedicina.it/images/coin-master-connection-lost_GM406889139.pdfIn PDF document text
    • https://www.dossiermedicina.it/images/free-minecraft-java-server_GM479516143.pdfIn PDF document text
    • https://www.dossiermedicina.it/images/robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.dossiermedicina.it/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.dossiermedicina.it/images/how-to-make-your-own-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://www.dossiermedicina.it/images/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • https://www.dossiermedicina.it/images/how-to-get-free-robux-on-android_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
stream_003_off00004b21.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B21 25760 bytes
SHA-256: 532e3f5c5b7de37337452a73e28a075ddaeafb91e0b0277feea06bdb8d2ee1db
font_01_sfnt_off00008723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8723 18276 bytes
SHA-256: 9aeb6f41d3354634239b7c8beac9b422ae3978a513a1679011b82127add4d155

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