Malicious PDF — malware analysis report

Static analysis result for SHA-256 96611308b9f01c44…

MALICIOUS

PDF

45.9 KB Created: 2021-06-07 06:09:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b126ccc3496b9f34f02b5a23bb0b5932 SHA-1: e1fd8b0f03335f06b20abe287b33c6175d59925a SHA-256: 96611308b9f01c441849d43d137d2383f4cb84f026f7f65f7f69815433c29067
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains, including one identified as malicious infrastructure. The primary lure appears to be related to game hacks and free in-game currency, a common social engineering tactic. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a workflow designed to lead the user to download or interact with further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.tw/app/431946152/get-roblox-free-online-game-hack In PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/coin-master-free-box_GM406889139.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/pokemon-go-free-roam-hack_GM1094591345.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/free-tiktok-followers-no-survey-or-verification_GM835599320.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/free-robux-live_GM431946152.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/coin-master-free-spin-2912-2021_GM406889139.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/pokemon-go-free-joystick-ios_GM1094591345.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/roblox-assassin_GM431946152.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/coin-master-free-500-spins-link_GM406889139.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/wurst-download_GM479516143.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/coin-master-card-collection-hack_GM406889139.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/how-to-downgrade-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/free-stuff-on-roblox_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
stream_004_off000051c2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51C2 28492 bytes
SHA-256: e7271e369e2baa17238b3afdad9601e3f23a80cae7f6e86bd590f3342c430e48
font_01_sfnt_off00009160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9160 18172 bytes
SHA-256: ece29258919a23a9a4d3e1c83535cea20254b3061052b5af9d1f22638da0da38

Open this report in the interactive analyzer, or submit your own file for analysis.