Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e06436c8234e982…

MALICIOUS

PDF

34.0 KB Created: 2021-07-03 18:13:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c52714f30b39e7c5b0bd1ecc22b43ce7 SHA-1: d1add8537b2d4b9ecb5563ceaa9bb32565cdf1a5 SHA-256: 7e06436c8234e9823841138e7db63fd7129723f0397140e97dadfdd33889da6e
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.tw/app/479516143/free-minecraft-skins-xbox-one-game-hack PDF link annotation
    • http://lib.smklabor.sch.id/repository/roblox-swear-hack_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-hack-apk-july-29_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-hack-roblox-without-verification_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-sell-t-shirts-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-tablet-hack_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/games-in-roblox-that-give-you-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-pin_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-link_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-hack-without-verification-for-iphone_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-friends-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-hacker-vs-pro_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/what-games-on-roblox-give-you-free-things_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/a-person-hacked-roblox-for-sex_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-be-thanos-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/give-free-robux_GM431946152.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
font_00_sfnt_off00002fee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FEE 22024 bytes
SHA-256: a0b4f4e6da9d965e6f244765525573ed598e7357ce08dc32ad605035c437f523
font_01_sfnt_off0000609c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x609C 18764 bytes
SHA-256: eb610aa1503b7a944f791f17a5e0f1d251ece699be101169bc2854c635750f4e

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