Malicious PDF — malware analysis report

Static analysis result for SHA-256 f060aa4eac0c7f08…

MALICIOUS

PDF

44.9 KB Created: 2021-06-03 13:44:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 26bc816b4bdd28bba6efb7262ee829f8 SHA-1: 0cf5034a993768656cc4ba0b7420831fb9aa52b6 SHA-256: f060aa4eac0c7f08320a17735169703220aa06e319ea65cc22f3b89d19f67c98
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, including one identified as a malicious redirector leading to a 'game hack' lure. The document body and heuristics indicate a social engineering tactic to trick users into visiting the malicious URL. No scripts were extracted, but the primary attack vector appears to be a phishing lure via a malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/406889139/coin-master-fan-club-game-hack In PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-images-free_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/is-minecraft-free-on-computer_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-hack-ios-app_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/roblox-accounts-for-sale-free_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-survival-free_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-daily-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/roblox-demon_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-shield-hack_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/earn-points-for-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-legally-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/freerubux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-spins-blogspot_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_off00004d55.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D55 28292 bytes
SHA-256: e812d15c87178bd07f2b77bc64dbbc3403f1f6e8ffcdc5bf9e6c4526532904f5
font_01_sfnt_off00008dd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD0 18080 bytes
SHA-256: 1b58ad6ca3986db2e615a45b5b3b997af56259df789f1331e37082b56e43c60a

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