Malicious PDF — malware analysis report

Static analysis result for SHA-256 f22d845f34356104…

MALICIOUS

PDF

33.8 KB Created: 2021-07-05 11:03:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ac547aedfb35ec34e7eca8f2d398f83e SHA-1: a64659bb6f2b50331baf2705a47c4339b42e871e SHA-256: f22d845f34356104da369254e576bd8998dcdefdada821a4dff48f32c937f527
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, masquerading as game hacks or generators. The primary link, http://netcdn.tw/app/479516143/minecraft-pocket-edition-mods-for-free-game-hack, is flagged as a known malicious redirector. The document body and heuristics indicate a lure for free game items, likely leading to further malware download or phishing. No scripts were extracted, but the PDF structure itself facilitates the malicious 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.tw/app/479516143/minecraft-pocket-edition-mods-for-free-game-hack In PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-spins-for-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/can-any-codes-give-u-free-robux_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/webrobloxcom-hack_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-free-accessories_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-2021_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-speeed-hack_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/bit-ly-free-robux-gen_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-hack-api_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-welcome-to-the-neighborhood-of-robloxia-v4-free_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-hack-a-minecraft-account_GM479516143.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-rbxnow_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/robux-hacks-2021_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_off0000303e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x303E 22016 bytes
SHA-256: 1234e77216d504591351bd4483cc7ba37ae41994356099c45968f19cf4ba4f5e
font_01_sfnt_off000060ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60EC 18496 bytes
SHA-256: f53502fd8dfdcb0e81f477cb61e2d3dd88ec9f063b8f20d7f418ef222ebf3320

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