Malicious PDF — malware analysis report

Static analysis result for SHA-256 29bb527c90485e2c…

MALICIOUS

PDF

44.2 KB Created: 2021-06-03 05:43:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 25d92436b1ef3318c84f3400fc3846e0 SHA-1: 448f967fb6a19585e7b956ef280cd1619b923a09 SHA-256: 29bb527c90485e2c08d7d9544e2ff5f2e37fbc49d886d2925b755dbe9a273dd1
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users to external websites, including a known malicious redirector. The document body and heuristic firings indicate a "free generator" or "game hack" lure, which is a common tactic for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content, likely leveraging T1059.007 if any active content is present, and initiating the attack chain via T1566.001.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/coin-master-spin-link-today-2021-game-hack In PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/free-foxy-food-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/free-daily-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/coin-master-free-spin-link-twitter_GM406889139.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/free-minecraft-svg-cutting-files_GM479516143.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/is-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/hack-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/oprewards-robux_GM431946152.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/how-much-robux-can-you-get-with-1-million-dollars_GM431946152.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/coin-master-cheats-free_GM406889139.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_off0000517d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x517D 24336 bytes
SHA-256: 7ff4bcd5bba9fc77f206c45cf8081ad53414bb29b1218d0ebec351a52947751b
font_01_sfnt_off000088f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88F1 18648 bytes
SHA-256: 85a64f08e45ce4d12cb3dea07aac547d867e231e390d244bf8ece1ec3ac8270e

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