Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2ad0b0bfb6736ec…

MALICIOUS

PDF

44.5 KB Created: 2021-05-12 13:02:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f6f4ce2b564b73251b8db28c87cc3c37 SHA-1: 1301399120ca978c74e693844b391083e7d8aa4e SHA-256: d2ad0b0bfb6736ec5583ba4644c32ecfc0975c4745ad4e277db155365658efaf
280 Risk Score

Malware Insights

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

The PDF contains multiple links to malicious redirectors and IP addresses, disguised as game hacks and free spin generators. The presence of a 'download button' lure and password protection instructions suggests an attempt to trick the user into downloading a secondary payload. The document body, though heavily obfuscated, contains references to 'Roblox Script Hacks' and embedded URLs, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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-script-hacks-game-hack In PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-scam-on-roblox_GM431946152.pdfPDF link annotation
    • http://111.68.26.74/widyapustaka/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/coin-game_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-block-someone-on-coin-master_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-trolling_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/omplete-surveys-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/where-to-get-robux_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-do-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/coin-master-free-spins-and-cards_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/coin-master-cards-hack-2021_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-robux-promo-codes-2021_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
stream_003_off0000488d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x488D 29224 bytes
SHA-256: fc4e04e8ef1595cb3247f5fb0be135ade311c93f3aa50267d1ba3e6a125d0723
font_01_sfnt_off00008aa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA0 18580 bytes
SHA-256: 535ec4be0d2657e9981f9200dcc4c4c41f6589372ce54f218017d5d6a2e1f0f5

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