Malicious PDF — malware analysis report

Static analysis result for SHA-256 9afc44d228b7466f…

MALICIOUS

PDF

49.3 KB Created: 2021-05-15 22:59:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 79b7957e249e9bc774b64e3a279edbe1 SHA-1: bdeb290cd4f2a1715c375ca72c8c8b64da574182 SHA-256: 9afc44d228b7466f407cd7778ff57be6a8bc8d24b29bb3401251fb0a67350539
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised with lures related to popular games like Roblox and Coin Master. The document body and embedded links strongly suggest a phishing or malware distribution attempt, leveraging social engineering tactics to trick users into clicking through to potentially harmful sites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8642

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/change-roblox-username-free-game-hack In PDF document text
    • http://www.hlad.hr/files/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-free-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/free-minecraft-education-edition_GM479516143.pdfIn PDF document text
    • http://www.hlad.hr/files/50-000-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/how-to-change-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/roblox-adopt-me-hacks-2021_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/hack-to-send-gold-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/oprewards-com-earn_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-spin-blogspot_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-34-4-hack_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-hacks-for-android_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/how-do-you-earn-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://wolfzscriptsIn 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_off0000491f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x491F 26556 bytes
SHA-256: d9554828abef8dd32bf98e92ce1dfc191423abfd4f115a2eeecdcf6bbdb213b3
font_01_sfnt_off000084fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84FD 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off00008ea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EA9 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off00009bba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BBA 19076 bytes
SHA-256: ccbe2cbfd93c87dda4ae88ea57378c4fd35d5f9fd376cb1def2d05d8f185a132

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