Malicious PDF — malware analysis report

Static analysis result for SHA-256 f32e72f0187fa7df…

MALICIOUS

PDF

41.7 KB Created: 2021-05-10 23:07:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3e1541da8d9f7f1063f3cc7851d8be78 SHA-1: 97dd79899f4ff947f99325091b2a7b011e814e75 SHA-256: f32e72f0187fa7dfe0d2409d6e36d9ee5ffdf43bd5bdccf31a8a43013a815702
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of game hacks and free items. The ML classifier also flagged this PDF as malicious. The embedded URL `https://netcdn.xyz/app/431946152/free-roblox-outfits-game-hack` is the primary lure, suggesting the document's purpose is to drive traffic to potentially malicious download sites or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/431946152/free-roblox-outfits-game-hack In PDF document text
    • http://electro-nrg.com/images/free-mod-apk-coin-master_GM406889139.pdfIn PDF document text
    • http://electro-nrg.com/images/free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://electro-nrg.com/images/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://electro-nrg.com/images/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • http://electro-nrg.com/images/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://electro-nrg.com/images/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://electro-nrg.com/images/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://electro-nrg.com/images/robux-download_GM431946152.pdfIn PDF document text
    • http://electro-nrg.com/images/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://electro-nrg.com/images/free-roblox-app_GM431946152.pdfIn PDF document text
    • http://electro-nrg.com/images/coin-master-free-rewards-link_GM406889139.pdfIn PDF document text
    • http://electro-nrg.com/images/coin-master-cheats-and-hacks_GM406889139.pdfIn PDF document text
    • http://electro-nrg.com/images/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://electro-nrg.com/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://electro-nrg.com/images/win-free-robux_GM431946152.pdfIn PDF document text
    • http://electro-nrg.com/images/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://electro-nrg.com/images/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://electro-nrg.com/images/lazyblocks-com-robux_GM431946152.pdfIn PDF document text
    • http://electro-nrg.com/images/coin-master-hack-8-ball-pool_GM406889139.pdfIn PDF document text
    • http://electro-nrg.com/images/coin-master-free-spins-ios-2021_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_003_off00004879.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4879 24856 bytes
SHA-256: 0731e8ffeb98351e5869d72b1dedcfa249513066de2c0f41940722c0ac6e737d
font_01_sfnt_off00008056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8056 18312 bytes
SHA-256: 90da43312d6bb992ca5b038b2bc6e2b12c2c9d98bca064d3c60a0cee32c74c59

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