Malicious PDF — malware analysis report

Static analysis result for SHA-256 be7fe42407fdf9aa…

MALICIOUS

PDF

34.4 KB Created: 2021-07-09 20:31:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 99433e162adb54c73c7d06592fd0ecb7 SHA-1: 86b22affecb50be0c9aea876ab39db8ddd1ce2e2 SHA-256: be7fe42407fdf9aaac536ef81339a3a6f51943829a044819fd557ec2a186ce42
220 Risk Score

Malware Insights

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

This PDF document contains numerous links designed to lure users into clicking on what appear to be game hack generators or free currency offers. The primary link redirects to a known malicious infrastructure, indicating a phishing or scam attempt. The document's structure and content suggest it is part of a campaign to drive traffic to potentially harmful websites.

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.tw/app/479516143/how-to-get-minecraft-coins-for-free-game-hack In PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/minecraft-windows-10-edition-free_GM479516143.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/im-hacking-your-game-roblox-id_GM431946152.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/download-coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/free-robux-android_GM431946152.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/roblox-rise-of-nations-hack_GM431946152.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/how-to-make-clothes-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/roblox-hacker-on-urbis_GM431946152.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/field-of-battle-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/how-to-get-free-penguin-costume-on-roblox_GM431946152.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/free-minecraft-videos_GM479516143.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/wurst-mc_GM479516143.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/inject-hack-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/roblox-jailbreak-free-vip-server-1-25_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_off00003232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3232 22472 bytes
SHA-256: c3e38ed04bcc7e9be1ffccd8a43b2d0f8a0596b1a1f5d67c9774fd5ddb7ea831
font_01_sfnt_off00006435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6435 18164 bytes
SHA-256: 08cfef77cd0745aa004e30d27b19be38b0f906a11dfdef7a7ac194d78643726e

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