Malicious PDF — malware analysis report

Static analysis result for SHA-256 862a690c3e21fae6…

MALICIOUS

PDF

35.1 KB Created: 2021-06-20 12:45:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0ee966eb74b8cd4d1a49671088dbf42c SHA-1: 5d22dbe40c48376524389fa864100f54cc216847 SHA-256: 862a690c3e21fae60de45f1b1bdb5717b5a223e6272aeeba34757aa9ad888f6e
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links designed to lure users with promises of game hacks and free in-game currency, impersonating brands like Microsoft. The primary link redirects to malicious infrastructure, indicating a credential phishing or malware distribution attempt. No scripts were extracted, but the PDF structure and embedded links strongly suggest a phishing or exploit delivery vector.

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: http://netcdn.co/app/431946152/roblox-explorer-hack-2021-game-hack.
  • 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.co/app/431946152/roblox-explorer-hack-2021-game-hack In PDF document text
    • http://elibrary.smknesbu.sch.id/repository/rbx-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-do-you-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-links-to-free-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/pokemon-go-free-coins-promo-code_GM1094591345.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-coins-and-spins-online-tool_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/a-cheat-engine-67-do-roblox-aim-bot_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-hack-someone-roblox-account-2021-july_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/new-speed-hack-roblox-2021-feb-2_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/booga-booga-cheats-roblox-deutsch_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-online_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-coins-in-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-hack-without-root_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-stop-roblox-from-crashing-when-hacking_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-server-side-explit-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/minecraft-114-download_GM479516143.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/cash-for-apps-free-robux_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_off000030b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30B9 22596 bytes
SHA-256: 5d54943bc737ae60425db18da2a0f9fe819a0b3b0a38b511b4919e1ac63bc8cc
font_01_sfnt_off00006348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6348 19236 bytes
SHA-256: cc214d8d773afea913c2c876556d023f4dd257bb72b1952ae33ee993f64f73e1

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