Malicious PDF — malware analysis report

Static analysis result for SHA-256 42bcef0182bcd85f…

MALICIOUS

PDF

36.0 KB Created: 2021-06-30 12:20:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 47a9db84c85edfc3d26efb0d2b040e98 SHA-1: 3f1502fd60efc12f0393d27790f9eea10e16c6d7 SHA-256: 42bcef0182bcd85f04e1222849d5f1c1f2366cc03ae364f339d6a109dc28651a
220 Risk Score

Malware Insights

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

This PDF document contains numerous links to websites offering game hacks and in-game currency generators, such as 'free Roblox Builders Club' and 'Coin Master free spins'. The heuristic firings indicate these links lead to malicious redirectors and a large link farm, suggesting a phishing or malware distribution scheme. The document's content and structure strongly indicate an attempt to trick users into visiting potentially harmful sites.

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.
  • 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.
  • 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/do-you-get-free-roblox-builders-club-on-the-weekend-game-hack In PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/coin-master-free-cards-link-2021-today_GM406889139.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/free-roblox-account-generator_GM431946152.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/free-robux-place_GM431946152.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/can-you-make-a-shirt-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/updated-free-roblox-shirts_GM431946152.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/mcpe-master-hack-unlimited-coins_GM406889139.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/claim-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/get-free-roblox-by-playi_GM431946152.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/hack-coin-master-spin-apk_GM406889139.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/roblox-steves-one-piece-money-hack_GM431946152.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/how-to-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/tiktok-free-auto-hearts_GM835599320.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_off000032e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32E9 22368 bytes
SHA-256: 305c9e58410838e472f3ff75d1285effec29e91acc38c9bcebf1f4183ec2c93d
font_01_sfnt_off000064dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64DC 20052 bytes
SHA-256: 65ab34ab5c9cc705924d7d93ff1acde2d883c3629664bb4c29e48d97a2ef701c

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