Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa4fe487a18a544d…

MALICIOUS

PDF

44.5 KB Created: 2021-06-03 09:31:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: d427ce76306fd95e954bcf14829cf1b7 SHA-1: 6a82575d79af480b5be9d4fcd0179cda68d0e9a2 SHA-256: aa4fe487a18a544d827f9c9c6499a0e89a3bc2d26e199f486d94f02c36eac7a7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free currency, as indicated by the document body and critical heuristic firings. It contains multiple embedded URLs that lead to known malicious redirectors and potentially unwanted content. The primary attack pattern involves tricking users into clicking links that likely lead to further malicious downloads or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/431946152/roblox-free-robux-no-verification-game-hack In PDF document text
    • http://licko.cz/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://licko.cz/files/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://licko.cz/files/coin-master-extra-spins_GM406889139.pdfIn PDF document text
    • http://licko.cz/files/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://licko.cz/files/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://licko.cz/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://licko.cz/files/free-exploits-for-roblox_GM431946152.pdfIn PDF document text
    • http://licko.cz/files/coin-master-free-spins-hacktman_GM406889139.pdfIn PDF document text
    • http://licko.cz/files/pubg-uc-xda_GM1330123889.pdfIn PDF document text
    • http://licko.cz/files/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://licko.cz/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://licko.cz/files/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://licko.cz/files/lucky-patcher-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://licko.cz/files/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://licko.cz/files/free-roblox-accounts-dantdm_GM431946152.pdfIn PDF document text
    • http://licko.cz/files/coin-master-hack-tool-for-pc_GM406889139.pdfIn PDF document text
    • http://licko.cz/files/how-to-make-a-modded-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://licko.cz/files/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://licko.cz/files/roblox-free-hair-boy_GM431946152.pdfIn PDF document text
    • http://licko.cz/files/minecraft-bedrock-edition-hacks_GM479516143.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_004_off00005047.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5047 25480 bytes
SHA-256: 2b3c618acf067d798bb3d85a4a5941bb791d673b836be015f9d803a39468eec1
font_01_sfnt_off00008a2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A2B 18676 bytes
SHA-256: d88aecf2630d4fcf6e85b9a2b5560aad6055705ec2bb19cbd5d89ce1bd292ac8

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