Malicious PDF — malware analysis report

Static analysis result for SHA-256 9145d09b34f53f9a…

MALICIOUS

PDF

32.6 KB Created: 2021-06-30 07:27:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 52733b428a89f2b01de5b6c18b5ecfbe SHA-1: 7b2d0107daeda26b5db66eb0e126205c35f21db0 SHA-256: 9145d09b34f53f9ada79369f254b7d04e8a6232ed99d8042781c80af59c786f7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector, masquerading as a game hack generator. The document body and embedded URLs suggest a lure for free game currency or hacks, likely leading to further malicious content or malware downloads. No scripts were extracted, but the presence of malicious redirectors and the ML classifier's high confidence indicate a high likelihood of malicious intent.

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/how-to-get-a-lot-of-robux-for-free-2021-game-hack In PDF document text
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu/repository/coin-mast-hacks_GM406889139.pdfIn PDF document text
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu//repository/cool-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu/repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu/repository/coin-master-free-spins-generator-no-verification_GM406889139.pdfIn PDF document text
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu/repository/free-spins-coin-master-android_GM406889139.pdfIn PDF document text
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu/repository/create-free-group-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu/repository/roblox-dll-hack-april-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu/repository/coin-master-hack-without-verification-ios_GM406889139.pdfIn PDF document text
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu/repository/coin-master-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu/repository/coin-master-free-daily-rewards_GM406889139.pdfIn PDF document text
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu//repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu/repository/coin-master-free-spins-link-download-apk_GM406889139.pdfIn PDF document text
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu//repository/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu/repository/free-bloxburg-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu/repository/roblox-piano-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu/repository/free-money-in-mad-city-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu//repository/free-roblox-toy-codes-not-used_GM431946152.pdfIn PDF document text
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu/repository/how-to-use-free-models-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu/repository/coin-master-daily-free-spins_GM406889139.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_off00002b23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B23 21244 bytes
SHA-256: 3f0709fb773f7ce1f025fe657dfd7fd45da6b539c72bc4990cdec18bf62b8652
font_01_sfnt_off00005968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5968 19384 bytes
SHA-256: 6323be0c93aa6c6bca374bc3174d2f0f5b846e323855214aeea9b3e7bb6c8fd8

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