Malicious PDF — malware analysis report

Static analysis result for SHA-256 f91551f077205cf7…

MALICIOUS

PDF

33.3 KB Created: 2021-06-26 13:44:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ad2b9c53b0de210a42e0cfa786d24156 SHA-1: c7c307af0e6871940779847b9f8ecd3ff4c6d53d SHA-256: f91551f077205cf77389e596cf5bba9c02c5b2205999a4d9b5226da93d610073
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The heuristic firings indicate the document is designed to lure users into clicking these links, likely leading to further malware downloads or phishing attempts. No scripts were extracted, but the presence of malicious redirector links and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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 http://netcdn.co/app/431946152/roblox-cheat-engine-wall-hack-game-hack In PDF document text
    • https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/roblox-btools-hacks_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/coin-master-game-free-play-online_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/minecraft-pe-mod-menu_GM479516143.pdfIn PDF document text
    • https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/roblox-rape_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/daniel-newhard-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/how-can-you-get-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/make-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/free-tiktok-likes-without-verification_GM835599320.pdfIn PDF document text
    • https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/best-free-roblox-plane-game_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/roblox-person_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/earn-robux-today-earn-robux-today_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/robux-robux_GM431946152.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002a81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A81 22572 bytes
SHA-256: bbb2399f30b4df40c5cee8fccb8e0ea30e95edc1fb7cd8beba15dcfc0fc50e20
font_01_sfnt_off00005cf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF6 19244 bytes
SHA-256: 204d0e41dce06212df179014f718901e4f65a64d9c9f7404b6b1ee998e046c4e

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