Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e1a574ffa7b4146…

MALICIOUS

PDF

35.1 KB Created: 2021-07-08 11:51:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e37fcc6b81453f6640a5812b128eacdb SHA-1: c1df8be568e845715cef13fb0b636c9f5f1f522b SHA-256: 6e1a574ffa7b4146422fdf757c0dff56a48f75c1cbc735ddf0c9376a02ae2512
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links designed to lure users with promises of free in-game currency and hacks, such as 'Robloxheroxyz Free Robux'. The primary link directs to a known malicious redirector infrastructure. This indicates a phishing or scam attempt, likely to harvest credentials or lead users to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/robloxheroxyz-free-robux-game-hack In PDF document text
    • http://elearning.manuputrabpc.sch.id/__statics/gudangsoal/files/como-obtener-robux-usando-cheat-engine-66_GM431946152.pdfIn PDF document text
    • http://elearning.manuputrabpc.sch.id/__statics/gudangsoal/files/roblox-e-free_GM431946152.pdfIn PDF document text
    • http://elearning.manuputrabpc.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://elearning.manuputrabpc.sch.id/__statics/gudangsoal/files/black-adidas-t-shirt-roblox-free_GM431946152.pdfIn PDF document text
    • http://elearning.manuputrabpc.sch.id/__statics/gudangsoal/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.manuputrabpc.sch.id/__statics/gudangsoal/files/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • http://elearning.manuputrabpc.sch.id/__statics/gudangsoal/files/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://elearning.manuputrabpc.sch.id/__statics/gudangsoal/files/mcpe-master-unlimited-coins-hack-apk_GM406889139.pdfIn PDF document text
    • http://elearning.manuputrabpc.sch.id/__statics/gudangsoal/files/coin-master-fun-free-spins_GM406889139.pdfIn PDF document text
    • http://elearning.manuputrabpc.sch.id/__statics/gudangsoal/files/coin-master-hack-cheat-generator-d_GM406889139.pdfIn PDF document text
    • http://elearning.manuputrabpc.sch.id/__statics/gudangsoal/files/how-to-get-bear-face-mask-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://elearning.manuputrabpc.sch.id/__statics/gudangsoal/files/www-coin-master-hack-tk_GM406889139.pdfIn PDF document text
    • http://elearning.manuputrabpc.sch.id/__statics/gudangsoal/files/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • http://elearning.manuputrabpc.sch.id/__statics/gudangsoal/files/how-to-get-free-diamonds-on-royale-high-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elearning.manuputrabpc.sch.id/__statics/gudangsoal/files/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.manuputrabpc.sch.id/__statics/gudangsoal/files/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.manuputrabpc.sch.id/__statics/gudangsoal/files/2021-free-robux-daily-website_GM431946152.pdfIn PDF document text
    • http://elearning.manuputrabpc.sch.id/__statics/gudangsoal/files/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://elearning.manuputrabpc.sch.id/__statics/gudangsoal/files/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://elearning.manuputrabpc.sch.id/__statics/gudangsoal/files/robux-get-com_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_off0000314a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x314A 22508 bytes
SHA-256: fba85006acad20eb238f667e8372251d8239c769bf74edb8545ca6854c002c48
font_01_sfnt_off000063a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A9 19220 bytes
SHA-256: 9a75403dc61fcebb8363624a6f582dcc4ac1fd2d4c1d167fae2ecfa95e24b96b

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