Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae326aa2da8eca35…

MALICIOUS

PDF

34.2 KB Created: 2021-06-26 22:28:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: bde798cbdab1d21b8c7aed977c7466b2 SHA-1: 0c21102f814d3fd0e5886bd59800ff227d5f6c59 SHA-256: ae326aa2da8eca35b8de1572970ad8d042e64fb56be4ac9c2720caa33ba7df0e
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/non-hacking-and-or-inspecting-for-robux-game-hack PDF link annotation
    • http://lib.smklabor.sch.id/repository/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-hack-ios_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-be-sponge-bob-on-roblox-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-spin-link-daily_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-can-i-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-spins-on-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-gift-card-giveaway-live_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-robux-hack-on-computer_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-roblox-noob-accounts_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-buiders-club-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/account-hacker-v2-0-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/the-northern-frontier-roblox-cheater_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-free-printables_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/hackaron-roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-generator-2021-december_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-robux-on-ipad-apple_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_off00002e5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E5B 21884 bytes
SHA-256: 1db0809e9f29f8a5e549ee868f1a5e8f87e0985e2c3d0b08a78d339af366409f
font_01_sfnt_off00005ed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED0 19660 bytes
SHA-256: cd33ec4df22e2a9fb52763e3f2b1aa52f9715eeda3f71722435e6b02a546c2e4

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