Malicious PDF — malware analysis report

Static analysis result for SHA-256 d40b27e421b70f05…

MALICIOUS

PDF

52.0 KB Created: 2021-06-08 15:05:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 87dd2510d5839db8206b5dd166c449bd SHA-1: 7e0e4c2b84e859c9211afb751e7c000c4965013b SHA-256: d40b27e421b70f055d754c1ba26ad222103df21f20553fc87e6a83a57302c205
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and cheats. The document body and embedded links suggest a lure to trick users into visiting a malicious site. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9657

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/guess-the-emoji-roblox-cheats-game-hack In PDF document text
    • http://digilib.iailm.ac.id/repository/free-coin-master-spins-no-verification_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/pubg-uc-20210_GM1330123889.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-ultra-attack-hack_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-hack-coin-master-in-pc_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-rewards-site_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-minecraft-com_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/www-coinmaster_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-bobux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-unlimited-spins-apk-free-download_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/collect-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/minecraft-java-edition-key-free_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/cute-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/gameoffice-net-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-free-spins-iphone_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/mcpe-free-download_GM479516143.pdfIn PDF document text
    • https://www.semrush.com/prices/In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51DA 26000 bytes
SHA-256: f77e565ada162f5ff8e9c50eaf9050e1ec42ffedba6f75cba55a196d817181e0
font_01_sfnt_off00008e37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E37 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off000097e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97E3 6100 bytes
SHA-256: f866077ce59d6ea276f75e4af76daa2aab5f3a1a679df144776123d85664d65c
font_03_sfnt_off0000a66f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA66F 18988 bytes
SHA-256: d724a1bd49950a8b8c6d74a75b4b7d5ee3d717961bcbedda2baa9643b4453cf8

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