Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d045c6dd4a8c4eb…

MALICIOUS

PDF

51.4 KB Created: 2021-05-13 10:04:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 307b0c8707b964fb261c9fc809f6cec0 SHA-1: 30fc4b577daf310d50bec263087f2aa3b80d5bf6 SHA-256: 4d045c6dd4a8c4ebdafe6863cfd7e2f6896f3c146c21a6c1d706c179bfd5f3ed
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free game hacks' and generators. The primary lure URL is https://netcdn.xyz/app/431946152/roblox-play-as-guest-free-game-hack, which is likely part of a phishing or malware distribution chain. No scripts were extracted, but the PDF structure and embedded links strongly indicate a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9348

Heuristics 4

  • 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.
  • 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/roblox-play-as-guest-free-game-hack In PDF document text
    • http://imp.lg.ua/images/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • http://imp.lg.ua/images/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://imp.lg.ua/images/master-coin-hack-game_GM406889139.pdfIn PDF document text
    • http://imp.lg.ua/images/kachifpro_GM406889139.pdfIn PDF document text
    • http://imp.lg.ua/images/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://imp.lg.ua/images/free-25-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://imp.lg.ua/images/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://imp.lg.ua/images/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://imp.lg.ua/images/coin-master-online-hack-no-survey-no-password_GM406889139.pdfIn PDF document text
    • http://imp.lg.ua/images/gamehunters-club-coin-master_GM406889139.pdfIn PDF document text
    • http://imp.lg.ua/images/coin-master-redeem-code-free_GM406889139.pdfIn PDF document text
    • http://imp.lg.ua/images/is-coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://imp.lg.ua/images/coin-master-spins-gratis_GM406889139.pdfIn PDF document text
    • http://imp.lg.ua/images/roblox40com-robux_GM431946152.pdfIn PDF document text
    • http://imp.lg.ua/images/roblox-army-robux_GM431946152.pdfIn PDF document text
    • http://imp.lg.ua/images/coin-master-gold-cards-free-link_GM406889139.pdfIn PDF document text
    • http://imp.lg.ua/images/best-hack-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://imp.lg.ua/images/is-coin-master-hacks-safe_GM406889139.pdfIn PDF document text
    • http://imp.lg.ua/images/free-roblox-cards-pin-number_GM431946152.pdfIn PDF document text
    • http://imp.lg.ua/images/cm-daily-spins_GM406889139.pdfIn PDF document text
    • https://direct-link.netIn 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_off00004c25.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C25 37136 bytes
SHA-256: a2dabd86b8b023acea0fd2ce9e28315381ee75f8480561e1c386b0a993223a2f
font_01_sfnt_off00009ba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BA3 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off0000a554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA554 18756 bytes
SHA-256: 536746ef029180016b10674303df9b70bf6b2620163374f544b37f1543ff13dc

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