Malicious PDF — malware analysis report

Static analysis result for SHA-256 adc733cf91adecd4…

MALICIOUS

PDF

32.1 KB Created: 2021-07-05 15:13:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b517a0447b98491474efe81d02d41432 SHA-1: 61035acd70e0cec0cb4ff56fe189a8fb868ceab4 SHA-256: adc733cf91adecd49c740dfa09100fcccd618319587a3ac5616791c77b5b469c
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game hacks and in-game currency to trick users into clicking malicious links. The document contains multiple embedded URLs, including one pointing to a known malicious redirector infrastructure and another to an IP address hosting further PDF files. These links likely lead to further stages of malware delivery or phishing attempts.

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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.tw/app/479516143/minecraft-sign-up-free-game-hack In PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-cheat-to-get-free-spins_GM406889139.pdfPDF link annotation
    • http://110.232.83.89/slimsppks/repository/coin-master-homepage_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/is-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-roblox-promo-codes-for-robux-2021_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/best-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-redeem-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-cheats-free-spins_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-32-hack-apk_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-robux-pls-i-need-some_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/how-to-make-free-shirt-or-pants-on-roblox_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/how-hack-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/cm-spins_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/ww-roblox-come_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_off00002b6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B6C 21608 bytes
SHA-256: 0068f94cd3cc9e944747153f44f81c2f2d3a1082fe231326d8824e835fbdf198
font_01_sfnt_off00005ad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD0 18220 bytes
SHA-256: 6236314a17f57ecfc4f63da4a6b9cb2d9143cd94f6dcae1b1ce204d4da3deb21

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