Malicious PDF — malware analysis report

Static analysis result for SHA-256 78621dff5db8d5a3…

MALICIOUS

PDF

35.0 KB Created: 2021-06-26 15:25:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2897f5049889ad0cd8f93149846bebc7 SHA-1: 46b39620b03126f743b96ae13ec36fe769717f5e SHA-256: 78621dff5db8d5a33e0aa10aafa9fb2529b46e2cca4b8ef1b0ca52130dc51854
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game currency and hacks to entice users to click on embedded links. The heuristic firings indicate that these links lead to malicious redirectors, likely serving as a distribution point for further malware or phishing content. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a social engineering attack.

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-get-free-robux-no-verification-2021-game-hack In PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/shinobi-life-roblox-hack-onyx-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/coinmasterfree_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/free-old-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/coin-master-levels_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/roblox-redeem-card-codes-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/how-to-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/minecraft-xbox-360-free_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/fast-to-use-roblox-hack-scrpits_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/free-robux-app_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/brother-cheating-on-his-roblox-girlfriend_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/hack-coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-roblox-outfits-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/how-to-change-your-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/hacks-to-get-free-goodlys-roblox-murder-mystery-2_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_off00002f96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F96 22500 bytes
SHA-256: d55e355c55c73f6d15ba736f85b9ed41b1e986041379e71bc731f4ee38009535
font_01_sfnt_off000061da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61DA 19640 bytes
SHA-256: daa201838bdbf48b85e104a71e58172e46eb57685cc2d98453f7e8ceecfd16ef

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