Malicious PDF — malware analysis report

Static analysis result for SHA-256 80dbf17efa46e241…

MALICIOUS

PDF

35.3 KB Created: 2021-07-08 09:23:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d6638a1878400af45c5717819e7ac8b4 SHA-1: 305e1e889904c6defcc4caf2d6885ea59149a69a SHA-256: 80dbf17efa46e2411eba51379c221caf7d84a6b03d884b142641cb492f486574
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to a known malicious domain, likely serving as a lure for free game currency or hacks. The ML classifier also flagged this PDF as malicious. The primary attack pattern involves directing users to malicious infrastructure via a deceptive lure, consistent with spearphishing attachments.

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.tw/app/431946152/free-robux-codes-2021-not-used-game-hack In PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/robux-roblox-free-hack_GM431946152.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/coin-mster-free_GM406889139.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/how-to-find-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/how-to-hack-a-roblox-account-password-2021_GM431946152.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/how-to-get-all-packages-for-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/roblox-cheat-codes-mobile_GM431946152.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/roblox-earn-free-robux-games_GM431946152.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/roblox-deathrun-hack-script-money_GM431946152.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/roblox-games-with-free-radio_GM431946152.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/roblox-typing-cheat-to-get-money-on-blox-burg_GM431946152.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/how-to-et-free-robux-april-2021_GM431946152.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/adfly-free-robux_GM431946152.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/rare-roblox-hacked-face_GM431946152.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/free-roblox-accessories_GM431946152.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/coin-master-free-spins-that-really_GM406889139.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/roblox-hack-client-robux_GM431946152.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/daily-free-spin-coin-master-link_GM406889139.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_off000030cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30CD 22712 bytes
SHA-256: cc0876d02198906d9dd0b8a17cefc1d2327ba064a5b78e767799eaa6e724b577
font_01_sfnt_off000063dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63DC 19396 bytes
SHA-256: 25d7bfe460846437b60ba32f00233ff0583bbe4639522c561b722c1edc24abf6

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