Malicious PDF — malware analysis report

Static analysis result for SHA-256 d60b29f08f56a460…

MALICIOUS

PDF

46.3 KB Created: 2021-05-13 00:34:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c6655c6ee446d685db2e6d1771bc7baa SHA-1: d409df2808c0a97eefda9e5f213b9e223a8559ed SHA-256: d60b29f08f56a4606e5784e8026d8bd292360019e54cc01c117d564ba34602b0
200 Risk Score

Malware Insights

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

The PDF contains multiple links to a malicious redirector, masquerading as a "Robux Hack" and impersonating the UPS brand to lure users. The primary malicious link identified is https://netcdn.xyz/app/431946152/robux-hack-no-verification-game-hack. The document body and embedded URLs suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8696

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: https://netcdn.xyz/app/431946152/robux-hack-no-verification-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 https://netcdn.xyz/app/431946152/robux-hack-no-verification-game-hack In PDF document text
    • http://lib.akper17.ac.id/repository/free-girl-hair-roblox_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/coin-master-daily-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/roblox-imagine_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/coin-master-daily-rewards-link_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/coin-master-spins-for-free_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/minecraft-free-download-2021_GM479516143.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/legit-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000497d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x497D 25276 bytes
SHA-256: dda4328c4b4a2afe0481e05067b673255d47501f38afb2d1584b13f3e5884ca2
font_01_sfnt_off00008428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8428 3992 bytes
SHA-256: 98ac760ceb0fcc9ebc3ae48b3987681152937195d8c60a590d6c0121deb77512
font_02_sfnt_off00009151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9151 18604 bytes
SHA-256: 770f8f6a3c3ea9ac3c319881d9f8005aae44889e6d1fc0dc42f8814bbcec8619

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