Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bd7507305a166ef…

MALICIOUS

PDF

47.4 KB Created: 2021-05-15 07:07:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 01f945815f8b4f334289b7aec093fca9 SHA-1: 3e9997548b16bc85b656b936295459840d182c2a SHA-256: 3bd7507305a166efa7a7de148d687da62875cda6363a8cb95d9b0faf47904324
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as game hacks and generators. The primary lure, 'how-to-make-a-roblox-group-for-free-game-hack', redirects to netcdn.xyz, which is flagged as malicious infrastructure. The presence of embedded URLs and the ML classifier strongly indicate malicious intent, likely to lead the user to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/how-to-make-a-roblox-group-for-free-game-hack In PDF document text
    • http://www.sovtigaz.ru/f/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-roblox-characters_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/roblox-avatar-editor-free_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-cheat-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/coin-master-free-spins-moonactive_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-spins-coin-master-links-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/coin-master-hack-android-no-root_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-robux-glitch_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004aa7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AA7 25476 bytes
SHA-256: 613a72fe5cc0ea471a661a53bb95de124489ca8b7875af968d21b0a9629376ef
font_01_sfnt_off00008612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8612 4604 bytes
SHA-256: 047a94e9d2267d7516869cd575aba7e16b5b1f0af5c8a93d6633ce8689a079d2
font_02_sfnt_off000094b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94B4 19020 bytes
SHA-256: d86a0664516f84ca778de604dc8f5b6c02622b942defeefdc42ca528d3381c5a

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