Malicious PDF — malware analysis report

Static analysis result for SHA-256 a79560d05acc83ce…

MALICIOUS

PDF

34.7 KB Created: 2021-06-28 23:06:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ab8d40d9c2a971f663b3ced7083d9c62 SHA-1: f54559151ba4878d2e8ba25ecb2760a2319f0550 SHA-256: a79560d05acc83ce37e1d532dd1cd2847f8c1a12ecd49c2beed118d548082c89
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites that are flagged as malicious redirectors, specifically advertising game hacks and generators. The document body and heuristics indicate a lure to click these links, which likely leads to a second-stage download or further malicious activity. No scripts were extracted from this sample, but the embedded URLs are the primary indicators of malicious intent.

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.co/app/431946152/roblox-ben-10-cheats-game-hack In PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/how-to-get-a-free-private-server-on-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-spins_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/iiwoodlandheadphones-trife-hacker-roblox_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/feburary-22-btools-hack-roblox_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/legitimate-coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/free-tiktok-followers-no-human-verification-or-survey-2021_GM835599320.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/roblox-patched-cheat-engine_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/best-free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/heroes-online-roblox_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/free-robux-no-survey-or-deals_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-hacks-no-human-verification_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/roblox-re_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/free-coin-master-spins-blog_GM406889139.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_off00003064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3064 22392 bytes
SHA-256: 7727bbc8b3f2436b73f051b8465a8a206f4f8489510b8aa3a7f895e769cb052d
font_01_sfnt_off0000625a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x625A 19032 bytes
SHA-256: e685198775bbc84b98b48c9f613ee6aaf566ecb1014742d5fb1ec99ed7e74162

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