Malicious PDF — malware analysis report

Static analysis result for SHA-256 68fac4c534f0d000…

MALICIOUS

PDF

35.0 KB Created: 2021-06-22 13:19:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 8fb10dd6efeded4c0e858f96dbd1868d SHA-1: 07256685ee46690507aa9cc1817d85f5ff4f0f9f SHA-256: 68fac4c534f0d0009a5c3ecbe66d224e5b7e31cb9a68ffd6c8d32669981a8f74
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users into clicking on "free generator" or "game hack" related content. The primary redirector URL is http://netcdn.co/app/406889139/blogspot-coin-master-free-spins-game-hack, which is associated with malicious redirector infrastructure. The document body and heuristics indicate a link farm strategy, likely to drive traffic to potentially malicious sites or download further malware. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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/406889139/blogspot-coin-master-free-spins-game-hack In PDF document text
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/how-to-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/bypass-cheat-engine-roblox_GM431946152.pdfIn PDF document text
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/free-cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/hack-to-send-gold-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/how-to-get-robux_GM431946152.pdfIn PDF document text
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/roblox-a_GM431946152.pdfIn PDF document text
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/free-tiktok-followers-no-survey_GM835599320.pdfIn PDF document text
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/roblox-sexually_GM431946152.pdfIn PDF document text
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/how-to-get-free-clothes-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021-march_GM406889139.pdfIn PDF document text
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-online_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_off00003376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3376 22468 bytes
SHA-256: 087d423e27e119a775e80e8d39d97a480a41c8d51bab6f3b1ec81aab58c7a7f2
font_01_sfnt_off00006592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6592 18464 bytes
SHA-256: d4f4a4328566268ab963e7ab93eb9b97adb01760eea7805a91b582d18af7b90a