Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b5b9faf82c5309a…

MALICIOUS

PDF

35.0 KB Created: 2021-06-25 18:11:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 070e2bebc4fe6680e4acf8c39ddc5c4c SHA-1: 4ece3c30a435295d5591c1c7f5509a0509a2b508 SHA-256: 4b5b9faf82c5309a1596fbfba7ff78307dac16341ec5fc246a5a7d4042c70d05
180 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors and IP addresses, masquerading as game hacks and generators. The document body and heuristics indicate a lure to download potentially malicious files or visit compromised sites. No scripts were extracted, but the embedded URLs and redirector findings strongly suggest a phishing or malware distribution attempt.

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.
  • 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 http://netcdn.co/app/431946152/roblox-cheat-codes-rocitizens-november-2021-game-hack In PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-roblox-gift-card-online_GM431946152.pdfPDF link annotation
    • http://111.68.26.74/widyapustaka/repository/minecraft-logo-maker-free_GM479516143.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-free-exploits_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/coin-master-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/new-free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-prison-life-before-it-was-hacked-10_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/minecraft-ps4-code-free_GM479516143.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-get-free-robux-on-android_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_off00002fad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FAD 22272 bytes
SHA-256: dcd203bd43c28a863c58e1111e63a661d864cffc67a4b3cc018eb363cc0c4d75
font_01_sfnt_off0000611a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x611A 19908 bytes
SHA-256: 99f77b7579727c2fccd92cdc987037e2bc4340f7bdf8c99d187414be5f2e605a

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