Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9a0664fb3a6f576…

MALICIOUS

PDF

48.6 KB Created: 2021-06-09 04:26:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 15fb1a7bd6e9ac37249a41751ceaa08d SHA-1: ca08cc90931eb710d9b3b60eb7aeaae20ca5e403 SHA-256: e9a0664fb3a6f576dc7c680c5de8136b251eec59f70a96990485ffc2fa285497
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as 'game hacks' or 'free generators'. The document body, though partially corrupted, contains references to these lures and embedded URLs. The primary malicious activity observed is the redirection to potentially harmful websites, likely to facilitate further malware delivery or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/surprise-texting-hacked-roblox-game-hack In PDF document text
    • https://www.franchiseinnovations.org/broker-site/files/files/robux-boost_GM431946152.pdfIn PDF document text
    • https://www.franchiseinnovations.org/broker-site/files/files/coin-master-free-spins-and-coins-group_GM406889139.pdfIn PDF document text
    • https://www.franchiseinnovations.org/broker-site/files/files/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://www.franchiseinnovations.org/broker-site/files/files/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • https://www.franchiseinnovations.org/broker-site/files/files/free-coins-2021-coin-master-link_GM406889139.pdfIn PDF document text
    • https://www.franchiseinnovations.org/broker-site/files/files/coin-master-download-hack_GM406889139.pdfIn PDF document text
    • https://www.franchiseinnovations.org/broker-site/files/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.franchiseinnovations.org/broker-site/files/files/roblox-sexually_GM431946152.pdfIn PDF document text
    • https://www.franchiseinnovations.org/broker-site/files/files/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • https://www.franchiseinnovations.org/broker-site/files/files/coin-master-hack-mod-apk-35-8_GM406889139.pdfIn PDF document text
    • https://www.franchiseinnovations.org/broker-site/files/files/coin-master-play-online-free_GM406889139.pdfIn PDF document text
    • https://www.franchiseinnovations.org/broker-site/files/files/coin-master-daily-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
    • https://www.franchiseinnovations.org/broker-site/files/files/how-to-block-someone-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.franchiseinnovations.org/broker-site/files/files/free-minecraft-windows-10-account_GM479516143.pdfIn PDF document text
    • https://www.franchiseinnovations.org/broker-site/files/files/how-to-get-free-coins-on-tiktok_GM835599320.pdfIn PDF document text
    • https://www.franchiseinnovations.org/broker-site/files/files/coin-master-free-cards-link-2021-today_GM406889139.pdfIn PDF document text
    • https://www.franchiseinnovations.org/broker-site/files/files/ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.franchiseinnovations.org/broker-site/files/files/daily-coin-master-free-spin-apk_GM406889139.pdfIn PDF document text
    • https://www.franchiseinnovations.org/broker-site/files/files/roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://www.franchiseinnovations.org/broker-site/files/files/games-like-minecraft-but-free_GM479516143.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_004_off00005458.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5458 25424 bytes
SHA-256: a519174ac51b3ca4814fd43029f89adf6e78f10cb7b30c5cd684030a6ccb4205
font_01_sfnt_off00008e90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E90 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off0000983f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x983F 19184 bytes
SHA-256: 082ec4f3d6ae2e4fb92b68791412e42cce0356420aebcd4bf3a59367efd9530e