Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3bc13d57038df17…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 11:42:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 7721fb7c53318cd4b837466ab814f071 SHA-1: 099eda6d96286f6e5d642b3d29589a2a22341d58 SHA-256: b3bc13d57038df17a530a5a7a734ac571ff3a04859b8e553ce68e7fb64833409
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically advertising 'free generators' and 'game hacks'. The ML classifier strongly flagged this PDF as malicious, and heuristics indicate it is designed to lure users to potentially harmful content. No scripts were extracted, but the presence of embedded URLs and the redirection behavior suggest an attempt to lead the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.tw/app/479516143/minecraft-build-hacks-game-hack In PDF document text
    • https://elearningmts.al-ahliyah.id/__statics/gudangsoal/files/lazyblocks-com-robux_GM431946152.pdfIn PDF document text
    • https://elearningmts.al-ahliyah.id/__statics/gudangsoal/files/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://elearningmts.al-ahliyah.id/__statics/gudangsoal/files/coin-master-hack-fast-org_GM406889139.pdfIn PDF document text
    • https://elearningmts.al-ahliyah.id/__statics/gudangsoal/files/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • https://elearningmts.al-ahliyah.id/__statics/gudangsoal/files/free-play-roblox-hotel_GM431946152.pdfIn PDF document text
    • https://elearningmts.al-ahliyah.id/__statics/gudangsoal/files/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • https://elearningmts.al-ahliyah.id/__statics/gudangsoal/files/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • https://elearningmts.al-ahliyah.id/__statics/gudangsoal/files/is-there-a-free-version-of-minecraft_GM479516143.pdfIn PDF document text
    • https://elearningmts.al-ahliyah.id/__statics/gudangsoal/files/robux-free-codes-2021_GM431946152.pdfIn PDF document text
    • https://elearningmts.al-ahliyah.id/__statics/gudangsoal/files/fps-universal-cheat-roblox_GM431946152.pdfIn PDF document text
    • https://elearningmts.al-ahliyah.id/__statics/gudangsoal/files/roblox-hack-dark-devs-one-piece_GM431946152.pdfIn PDF document text
    • https://elearningmts.al-ahliyah.id/__statics/gudangsoal/files/coin-master-free-coins-link-march-2021_GM406889139.pdfIn PDF document text
    • https://elearningmts.al-ahliyah.id/__statics/gudangsoal/files/how-to-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://elearningmts.al-ahliyah.id/__statics/gudangsoal/files/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://elearningmts.al-ahliyah.id/__statics/gudangsoal/files/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://elearningmts.al-ahliyah.id/__statics/gudangsoal/files/roblox-hunger-games-catching-fire-cheats_GM431946152.pdfIn PDF document text
    • https://elearningmts.al-ahliyah.id/__statics/gudangsoal/files/free-robux-videos_GM431946152.pdfIn PDF document text
    • https://elearningmts.al-ahliyah.id/__statics/gudangsoal/files/coin-master-hack-without-verification-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • https://elearningmts.al-ahliyah.id/__statics/gudangsoal/files/roblox-star-wars-hack_GM431946152.pdfIn PDF document text
    • https://elearningmts.al-ahliyah.id/__statics/gudangsoal/files/how-to-get-free-robux-on-pc_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_off0000320c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x320C 22400 bytes
SHA-256: 03c3606c73bc9378bf5d040295736bb2b605fc581ce0c610a4ab96cf2b246d56
font_01_sfnt_off000063cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63CB 18628 bytes
SHA-256: a4fd7a8a6c31dcfbd5d524261ca24fbd66144d88575524e109ec8b87e7a5b6d6

Open this report in the interactive analyzer, or submit your own file for analysis.