Malicious PDF — malware analysis report

Static analysis result for SHA-256 3abc90b432554123…

MALICIOUS

PDF

44.4 KB Created: 2021-05-16 20:08:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 2a47d98507d427f99c6cf79ee1c6fbfb SHA-1: 7700d1d03e4bfb8d92f7b4b77c826fa6a1f491d8 SHA-256: 3abc90b43255412332fff962a45a13e4a206c07bf64bf459904b65f833f847c8
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and link farms, masquerading as generators for popular games like Coin Master and Roblox. The heuristic firings indicate a malicious redirector and a link farm, suggesting the primary purpose is to drive traffic to potentially malicious sites. No scripts were extracted, but the document body and heuristics point to a social engineering lure for users seeking game cheats.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/406889139/coin-master-free-generator-game-hack In PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/card-hack-in-coin-master_GM406889139.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/coin-master-free-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/install-coin-master_GM406889139.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/how-do-you-earn-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/free-minecraft-realms-to-join_GM479516143.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/how-to-get-free-coins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/coin-master-pc-game-free-download_GM406889139.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/does-coin-master-hack-work_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000494e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x494E 24856 bytes
SHA-256: fd37f72adde73c0b182d6877a92f7209b6958570af728bbae0fe70fb7e067506
font_01_sfnt_off000082bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82BC 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008ca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CA6 17712 bytes
SHA-256: f6b7bbb27796bfdd91832c5c9631b2ef3c604ec4967bc220e21b541acce31e79

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