Malicious PDF — malware analysis report

Static analysis result for SHA-256 5682d93025a78313…

MALICIOUS

PDF

45.2 KB Created: 2021-06-10 14:31:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b651df6b2e4f30736508e8251da13189 SHA-1: 9bf091f9488ce06f2d4013f2a8b1d6803336b7b7 SHA-256: 5682d93025a783139377603fe0e57204338a404f60a946a7766f29a616541c0e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a website offering 'free Robux' and 'game hacks', a common lure for phishing or malware distribution. The ML classifier also flagged this PDF as malicious. The document body and embedded URLs strongly suggest a social engineering attempt to trick users into visiting a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/how-to-get-free-robux-2021-easy-game-hack In PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-map_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-fan-page-giveaway_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/rewardrobux-com_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-money-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/minecraft-book-collection_GM479516143.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-pet-food-free_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/blogger-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-app_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-game-hack_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-get-free-clothes-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-views-tiktok_GM835599320.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/body-roblox_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/tiktok-free-online-unblocked_GM835599320.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-hack-2021-free_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
font_00_sfnt_off00005032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5032 25764 bytes
SHA-256: 47a1cd6d57133a37189ace245b4ffe1b522b61e729caa2b654c230d751de23d8
font_01_sfnt_off00008b4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B4A 19092 bytes
SHA-256: cc4041fc50bd2ea9a1268967e32916156e3a634973a216864dd7f220ceb04504

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