Malicious PDF — malware analysis report

Static analysis result for SHA-256 b77542e7edf60625…

MALICIOUS

PDF

33.6 KB Created: 2021-06-18 18:12:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: ca6da96452f2f4ef1c44b297ed69b4bf SHA-1: 9f5ab5fca6492dced5353a64b79f732ab7ccb5aa SHA-256: b77542e7edf606253d3cfc13bc8ef1e020b95265101f8eedbac8304b6e060979
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game currency and hacks to trick users into clicking malicious links. The primary link redirects to a known malicious infrastructure, which in turn hosts further malicious PDFs. The document body contains numerous URLs pointing to various game-related cheats and hacks, indicating a phishing or scam attempt.

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.co/app/431946152/admin-hack-roblox-2021-game-hack In PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-app_GM431946152.pdfPDF link annotation
    • http://103.40.122.33/akasia/repository/roblox-mobile-cheat-codes_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/hack-para-jailbreak-roblox-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-free-wings-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-verified-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-apk-ios_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/hole-in-the-wall-roblox-hack_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-pal-hair-free_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-generators-that-actually-works-2021_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_off00002de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DE9 21352 bytes
SHA-256: da1686b0579e946f53fb49c0306540ca0818f02a8ceea0b5a19bbe794d0f8448
font_01_sfnt_off00005c62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C62 19612 bytes
SHA-256: d6d24aa0826e2503a67c0e62426ea59cc43f5893ef946b727b9d8c5d7d9d9e34

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