Malicious PDF — malware analysis report

Static analysis result for SHA-256 98b60c96ba4f8789…

MALICIOUS

PDF

40.0 KB Created: 2021-05-10 16:19:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6971d7449d1cd3116522a5ce8593d237 SHA-1: 879bd6a2c76c99a7829cc9c3e7c0c7828c137104 SHA-256: 98b60c96ba4f8789d61efca2427fd07e48f49c7e6f0c4bde1f6acd474eb38891
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of free game currency and hacks. The primary URL, 'https://netcdn.xyz/app/406889139/coin-master-daily-free-spins-link-today-facebook-game-hack', is identified as a malicious redirector. The document's content and embedded URLs strongly suggest a phishing or scam campaign aimed at tricking users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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.xyz/app/406889139/coin-master-daily-free-spins-link-today-facebook-game-hack In PDF document text
    • http://autenticohostalsalou.com/images/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://autenticohostalsalou.com/images/how-to-get-free-food-for-foxy-in-coin-master_GM406889139.pdfIn PDF document text
    • http://autenticohostalsalou.com/images/free-minecraft-java-edition-codes_GM479516143.pdfIn PDF document text
    • http://autenticohostalsalou.com/images/coin-master-free-spin-facebook-link_GM406889139.pdfIn PDF document text
    • http://autenticohostalsalou.com/images/coin-master-free-pin_GM406889139.pdfIn PDF document text
    • http://autenticohostalsalou.com/images/coin-master-free-gold-cards-link_GM406889139.pdfIn PDF document text
    • http://autenticohostalsalou.com/images/coin-master-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
    • http://autenticohostalsalou.com/images/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://autenticohostalsalou.com/images/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://autenticohostalsalou.com/images/free-robux-download_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_off00004163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4163 24220 bytes
SHA-256: a6b37ce6723a03a100869a938862c1f1a085d85a0c57b78e2cf199e56a5c3ced
font_01_sfnt_off000078f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78F4 18808 bytes
SHA-256: 4857649f58737dfd5d3cde565af8420aeb724b61b1648601542f846ee8275f41

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