Malicious PDF — malware analysis report

Static analysis result for SHA-256 5caddb3f7db613bb…

MALICIOUS

PDF

33.4 KB Created: 2021-07-03 12:04:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 92b27a23b46fb4673f12000d8cb57fc4 SHA-1: 66e176b5177f69d214c4fbc876fa3c19643b8682 SHA-256: 5caddb3f7db613bb4af82ee08b51657118f1db497ff0880a1ea136ed918da9e6
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to external websites, including one identified as a malicious redirector. The document body and embedded links suggest a lure for free game hacks or gift cards, a common social engineering tactic. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 3

  • 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.
  • 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/431946152/roblox-gift-card-online-free-game-hack In PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/roblox-earn_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/hack-coin-master-online_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/hack-turkey-roblox_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-make-a-group-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-how-to-reclaim-hacked-accounts_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/coin-master-hacks-that-work_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/robux-sites_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-free-candy-song_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/what-is-pubg-uc-carding_GM1330123889.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/try-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/rocket-simulator-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-play-free-without-downloading_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-hack-apk-35-8_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/robux-hack-free-robux_GM431946152.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_off0000320a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x320A 21856 bytes
SHA-256: d364b545bf48df923d466e8a79387e28cd9967e090b271301eb8d97cfb1385a6
font_01_sfnt_off0000624f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x624F 19048 bytes
SHA-256: 55b46331afb2a8069782d8597c001b3c0c12b84d77f3d9baa1c75e4cada97544

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