Malicious PDF — malware analysis report

Static analysis result for SHA-256 77d08f181a29b184…

MALICIOUS

PDF

34.2 KB Created: 2021-06-19 01:39:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 7529d0a38be51da273f6a2c174bbd768 SHA-1: 0983c61048dc3aaad3ee46ff5e4fa01cd1e805b4 SHA-256: 77d08f181a29b1847525f0021cf0672684839c2e0aa45f6196487bac26fed471
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for game hacks and free in-game currency, directing users to a known malicious redirector. The embedded URLs and document body content strongly suggest a phishing or scam attempt to trick users into visiting malicious sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/how-to-hack-robux-on-phone-game-hack In PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/best-free-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/roblox-images_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/gaming-dunia-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/complete-offers-for-robux_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/robux-generator-com_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-script-executor-roblox_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30F1 21532 bytes
SHA-256: 8c6e8f552fbf098cdb646d2b5c96d57ab8c70b5e2ac6bf879e7d3f483f603b3b
font_01_sfnt_off0000600c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x600C 19204 bytes
SHA-256: 962bea862472ebd67f665f9210c06f8702414cceb46c360eed37a80c01d15a90

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