Malicious PDF — malware analysis report

Static analysis result for SHA-256 13cb0bdf347af8b7…

MALICIOUS

PDF

44.6 KB Created: 2021-06-04 05:17:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: d7418a566c170ceb8cd6d24e2f2af760 SHA-1: 4237faaefc4244a329be375832f51881322f1dcb SHA-256: 13cb0bdf347af8b78cd34402b95824aa29a550b045e9e0f079bedbd02dcb803b
260 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to websites offering game hacks and free in-game currency, a common lure for social engineering attacks. The heuristic firings indicate these links lead to malicious redirectors and a link farm designed to drive traffic. The document body also contains a call-to-action to view content, further supporting a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.online/app/406889139/coin-master-blogspot-free-spins-game-hack In PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-robux-real_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-roebucks-no-human-verification_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/smart-lodhi-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/coin-master-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/hack-coin-master-net_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-card-collection-in-coin-master_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-spin-link_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/coin-master-event-hack_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/best-free-spins-link-coin-master_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/coin-master-hack-free-spins_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
stream_004_off0000526c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x526C 25064 bytes
SHA-256: 3cccf599d4ed751c3352582cf20bd30c4836505947b3c311fd93ec17bd24a3dc
font_01_sfnt_off00008b1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B1E 18464 bytes
SHA-256: 2b0c06a22c9a5edb3443ab86616b5007231cf3140ae51cb1863842ad9c8d5786

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