Malicious PDF — malware analysis report

Static analysis result for SHA-256 efa61dc12ad7cee2…

MALICIOUS

PDF

36.8 KB Created: 2021-06-29 06:52:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: bbaadccd01f230927600b4606813719e SHA-1: 73d3b16b61cc79165b34441bc04c50f7ee945729 SHA-256: efa61dc12ad7cee2670a2baf7e9d1510da680d815ddb2b378ab5ccbf11e0e878
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites offering game hacks and free Robux, which are common lures for malicious activity. The heuristic firings indicate that these links lead to known malicious redirectors and are part of a game hack lure. The document body, though partially corrupted, also contains embedded URLs pointing to similar scam content. No scripts were extracted from this sample, but the overall pattern suggests a phishing or malware distribution attempt.

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/how-to-hack-roblox-for-free-robux-2021-game-hack In PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/cupcake-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/how-to-hack-roblox-with-chrome-extensions_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/robux-hack-with-tampermonkey_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/robux-cheat-android_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/mcpe-download_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/roblox-hack-robux-and-tix-no-download-no-survey_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/roblox-hack-sprint-simulator_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/roblox-deutsch-free-download_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/cool-backgrounds-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-minecraft-website_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/how-to-get-robux-on-roblox-hack-no-offer_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/how-to-get-free-robux-2021-october_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/how-to-get-free-tiktok-followers-without-human-verification_GM835599320.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/new-hack-for-roblox-deathrun-2021-november-pc_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_off000035ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35AB 23016 bytes
SHA-256: e9e49c9b0073c243a85bc2e2d2321ac64c3f764fb5226608eeb62c40e1fd73e7
font_01_sfnt_off0000696b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x696B 19528 bytes
SHA-256: 0ea56fc9ec4ddac6c3d216bd78e37efa370462606f735cb41edc8d86764203e9

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