Malicious PDF — malware analysis report

Static analysis result for SHA-256 1980f36106775a70…

MALICIOUS

PDF

44.9 KB Created: 2021-06-04 00:35:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 09a05a6def788c672aab3c26a24826ce SHA-1: 020ba9d638a491e4d67d7893c278998ca25b7518 SHA-256: 1980f36106775a7078df37ed1cea48b1a5f4f8b15ac30f05877d9fde56acc664
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure, specifically advertising 'coin master free spin' and 'game hack' generators. The primary lure URL is https://netcdn.online/app/406889139/coin-master-free-spin-whatsapp-group-link-game-hack, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and appears to be designed to trick users into clicking through to potentially malicious content. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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-free-spin-whatsapp-group-link-game-hack In PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-100-spin-hack_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/chisel-and-bits-mod-pe_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/minecraft-cheat-client_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-free-spins-link-2021-twitter_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-minecraft-for-free-2021_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-roblox-account-generator_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-hack-iphone_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-place_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-real_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-hair-roblox-boy_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
stream_004_off00005101.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5101 25636 bytes
SHA-256: 3ff6836fb9ac60b6b6c0b3f7d0f7b6e1977dda78f31bc94a537409b20e4e9f65
font_01_sfnt_off00008c19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C19 18560 bytes
SHA-256: c65993a8877690b51d5778b5551e0b245465244fc3a88f38fe2d5d44dfc47c4d

Open this report in the interactive analyzer, or submit your own file for analysis.