Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3582bad9e3acf14…

MALICIOUS

PDF

49.1 KB Created: 2021-05-10 21:40:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 946f515dfe1e506de7803542561f59f4 SHA-1: 6193f2c8d6138e71ab4dc9d85183347f5d7b1469 SHA-256: a3582bad9e3acf148b4d95c4f15c60640c3619da97905a159b665c7dfc0de10d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, including one that masquerades as a "free generator / game hack" for Roblox. The document body and extracted URLs suggest a lure for game-related cheats or currency, which is a common social engineering tactic. While no scripts were explicitly extracted, the PDF structure and embedded links strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9228

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/free-roblox-gift-card-game-hack In PDF document text
    • http://repository.poliven.ac.id//repository/coin-master-hack-apk-2021-ios_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/free-hair-roblox-boy_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/how-to-make-a-server-in-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/claim-robux_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/ww-robux_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/coin-master-hack-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/coin-and-spin_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/how-to-get-free-chest-in-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/links-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004922.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4922 31740 bytes
SHA-256: 89da46ffd7d70676457f18227ba62be7bb3b66e68fc4a8a031e33a6aa1155a7a
font_01_sfnt_off00009306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9306 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off00009cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CB6 18572 bytes
SHA-256: d6dd878634c6e0bfa0573f8d07d8c04072d5223543faa3ff40eccc306bc8b9ad

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