Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a3b87cd6208b14a…

MALICIOUS

PDF

35.1 KB Created: 2021-06-19 20:59:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 2d94f08feead3348d7fab7d48cd0c494 SHA-1: 36bf5a98458829d3d852bcb84faf7afd838b055c SHA-256: 2a3b87cd6208b14a59d794aa7ef3401450e5462fecfb29922543ffbfdbd8447e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks and generators. The primary lure, 'Roblox Full Game Free Download', points to a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or social engineering attack aimed at driving traffic to potentially malicious download sites.

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-full-game-free-download-game-hack In PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-online-hack_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-hack-iphone_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/minecraft-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-free-account_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-free-spin-sites_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/ultimate-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/how-to-earn-free-robuxs_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/hack-de-juegos-robux_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/free-robux-videos_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/free-robux-co_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/roblox-hack-pacht-fix_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-hack-with-facebook-login_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_off000030bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30BD 22400 bytes
SHA-256: b2cea7ac029503699bbe4bb64591d0856a207d61ea16e3cfc591e5c7dbf44e1f
font_01_sfnt_off000062bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62BD 19556 bytes
SHA-256: 99b5c1298fb84d6b11b25eb221573c986c3335b16adaae2f477c8fed0d3405f2

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