Malicious PDF — malware analysis report

Static analysis result for SHA-256 69311283afb2e851…

MALICIOUS

PDF

35.0 KB Created: 2021-07-03 13:45:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 01bba9dcdc0c8a4787ccc8cbb568a5d0 SHA-1: ff23d56a01df1b541f1c1d5652a79e9ad905d121 SHA-256: 69311283afb2e8515a54e9d61655154a9d7dee109414811e1f0fe377f49ed7f2
160 Risk Score

Malware Insights

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

This PDF document employs a lure for game hacks and generators, directing users to malicious redirectors. The presence of embedded URLs and a visual download button suggests an attempt to trick users into downloading potentially malicious content. The ML classifier also strongly indicated maliciousness.

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-java-free-download-game-hack In PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-free-stuff-links_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/100-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-get-free-cards_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-free-coins-and-spins-link-today_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-hack-100-working_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/minecraft-pocket-edition-hack_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/village-coin_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-roblox-hoods_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/robux-offer-wall_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-link_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-game-hunter_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/roblox-exploit-scripts_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-2021-no-verification_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_off0000310c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x310C 22940 bytes
SHA-256: b746d79eaafabdbcdd843f99cfa061d4b37b4298c15ffe3127a0ac8f204c773c
font_01_sfnt_off00006480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6480 18856 bytes
SHA-256: b0096c3c5e481a4f2c1c49fcffa9b92b3b8114a7f846d47264883f0ea9db8c51

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