Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3979ec4693df84c…

MALICIOUS

PDF

40.9 KB Created: 2021-05-17 19:51:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 767a9a3f05d21a95b30ea68dd482cf10 SHA-1: 557f4df87d6931f4641a556f9b66e826d66ad3f7 SHA-256: a3979ec4693df84c04542558f7e44c1ac7e329b60faee29d289b0438c24f70d4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as free game hacks and generators. The ML classifier also flagged this PDF as malicious. The presence of embedded URLs and the nature of the lures suggest an attempt to direct users to malicious sites for further exploitation, likely involving malware downloads or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/479516143/minecraft-free-ios-game-hack In PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/coin-master-2021-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/robux-free-com_GM431946152.pdfIn PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/robuxhub-net_GM431946152.pdfIn PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/coin-master-free-spins-link-facebook-page_GM406889139.pdfIn PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/coin-master-free-spins--spins_GM406889139.pdfIn PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/coin-master-free-daily-spins-today_GM406889139.pdfIn PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/aristois-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/coin-master-free-spins-for-iphone_GM406889139.pdfIn PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/coin-master-free-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/link-for-free-coins-in-coin-master_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_off00004824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4824 24400 bytes
SHA-256: cac14fdece4cc99f1e0cd707807833adb1dc0a4fdea96f733e712fbbe3e99dca
font_01_sfnt_off00007f11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F11 17712 bytes
SHA-256: 54d91aee1a0896e30cfb652b9b9fc91e7951cfaa65da7a48657c461bc2dd637d

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