Malicious PDF — malware analysis report

Static analysis result for SHA-256 7919cf9462bd2157…

MALICIOUS

PDF

44.0 KB Created: 2021-05-11 13:34:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 0b74a011fd1ec17046391d14f87d53db SHA-1: fa2e9d9aff38aa463f8561a01672061c2b343312 SHA-256: 7919cf9462bd2157ccba8b2e6ebc6dbaff0ee310a87e3f4120dd69632a278e02
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure related to free game currency and hacks, directing users to a malicious redirector. The redirector, in turn, hosts multiple other malicious PDF files, indicating a chain of malicious content delivery. The ML classifier strongly flagged this sample as malicious, supporting the observed redirection and lure tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/how-to-get-free-robux-codes-game-hack In PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/free-roblox-card_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/free-spins-coin-master-links-blogger_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/what-do-roblox-points-do_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/toolbox-mod_GM479516143.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/como-hackear-el-juego-coin-master_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/hack-coin-master-app_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/free-coin-master-s_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/robux-prices_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/can-i-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/links-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/coin-master-free-spins-link-2021-no-verification_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
stream_003_off00004b03.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B03 28148 bytes
SHA-256: a1add5edc7b63570af8ac6fb29bc782d845742c9ac40ff121f0f73c349e6c9a5
font_01_sfnt_off000088f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88F7 18456 bytes
SHA-256: 647704a1f8ac96c456e26df3796ee2ada4959e42324ca69004a5f2968b1e2bf7

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