Malicious PDF — malware analysis report

Static analysis result for SHA-256 60ddb85122cb380d…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 14:28:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: fef4c10413ee7526e101e4b780ca3b77 SHA-1: a43e4208c1e3c8d1d6bb715f6b1cc8e711cd54bd SHA-256: 60ddb85122cb380d18bd8fc9d27e7e694f9e72eca4e569b9e572c05fee8b8569
200 Risk Score

Malware Insights

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

The PDF document contains multiple links to redirector infrastructure, specifically advertising free generators and hacks for popular games. The heuristic firings indicate these links lead to known malicious redirectors and potentially exploit client execution. The document body and embedded URLs strongly suggest a lure for users seeking in-game advantages, which is a common social engineering tactic to deliver malware.

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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/406889139/free-coins-spins-on-coin-master-game-hack In PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/pokemon-go-free-avatar-items_GM1094591345.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/hack-coin-master-apk-32-download_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/block-best-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-full-spiderman-outfit-free-spiderman_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-hack-with-cmd_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/best-roblox-hair-free_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/minecraft-pe-hacks_GM479516143.pdfIn macro / runtime command snippet
    • http://www.perpustakaan.unda.ac.id//repository/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-hack-tool-generator_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-robux-for-kids-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-generator_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-get-a-free-backpack-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/coin-master-cheats-and-hacks_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-robux-reddit_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/reposIn macro / runtime command snippet
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000311d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x311D 23172 bytes
SHA-256: 5e0adc4b11a75d77b66cc72019369df0484d946ba0a585e0705ef9de6592cec2
font_01_sfnt_off00006555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6555 18176 bytes
SHA-256: c5238e13390a97467cde097dbe7f4adee10234cfd48eaefab3fd38a64812b74c

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