Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a7d8924cbaefc31…

MALICIOUS

PDF

35.3 KB Created: 2021-06-27 16:57:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0fe1782a8f57a4270ce345d551f76db5 SHA-1: 25a77403239b80802ebe13e8cb2fca241e90e6e0 SHA-256: 2a7d8924cbaefc313fa5857efcf6c9b171c01f9a504754b7dcdfe055d15e060c
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.co/app/431946152/2021-roblox-hack-game-hack PDF link annotation
    • http://elearning-man2kotabogor.sch.id/__statics/gudangsoal/files/roblox-unlimited-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elearning-man2kotabogor.sch.id/__statics/gudangsoal/files/roblox-bucks-hack-deutsch-erfahrungen_GM431946152.pdfIn PDF document text
    • http://elearning-man2kotabogor.sch.id/__statics/gudangsoal/files/free-robux-groups-roblox_GM431946152.pdfIn PDF document text
    • http://elearning-man2kotabogor.sch.id/__statics/gudangsoal/files/hack-de-atravesar-paredes-roblox_GM431946152.pdfIn PDF document text
    • http://elearning-man2kotabogor.sch.id/__statics/gudangsoal/files/como-conseguir-robux-gratis-en-roblox-2021-sin-hacks_GM431946152.pdfIn PDF document text
    • http://elearning-man2kotabogor.sch.id/__statics/gudangsoal/files/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning-man2kotabogor.sch.id/__statics/gudangsoal/files/how-to-hack-a-roblox-game-2021_GM431946152.pdfIn PDF document text
    • http://elearning-man2kotabogor.sch.id/__statics/gudangsoal/files/free-robux-hack-real-2021_GM431946152.pdfIn PDF document text
    • http://elearning-man2kotabogor.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://elearning-man2kotabogor.sch.id/__statics/gudangsoal/files/good-outfits-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://elearning-man2kotabogor.sch.id/__statics/gudangsoal/files/zephplayz-free-robux-website_GM431946152.pdfIn PDF document text
    • http://elearning-man2kotabogor.sch.id/__statics/gudangsoal/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://elearning-man2kotabogor.sch.id/__statics/gudangsoal/files/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://elearning-man2kotabogor.sch.id/__statics/gudangsoal/files/free-robux-obby-youtube_GM431946152.pdfIn PDF document text
    • http://elearning-man2kotabogor.sch.id/__statics/gudangsoal/files/free-level-6-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://elearning-man2kotabogor.sch.id/__statics/gudangsoal/files/how-do-you-hack-an-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://elearning-man2kotabogor.sch.id/__statics/gudangsoal/files/free-roblox-robux-hack-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://elearning-man2kotabogor.sch.id/__statics/gudangsoal/files/free-robux-without-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://elearning-man2kotabogor.sch.id/__statics/gudangsoal/files/how-to-hack-itfunneh-roblox-acc_GM431946152.pdfIn PDF document text
    • http://elearning-man2kotabogor.sch.id/__statics/gudangsoal/files/free-roblox-gift-card-codes-2021_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_off0000332f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x332F 22248 bytes
SHA-256: 4842c4b5de61f373fd6021026030c96ea770d47589eebed27c6e2597f9e252f7
font_01_sfnt_off0000649c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x649C 19056 bytes
SHA-256: 00128e2c2d07783b19b116e89542ef06b65045f9639b9b14a9215adb502c94af

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