Malicious PDF — malware analysis report

Static analysis result for SHA-256 446b3e7a58a681e5…

MALICIOUS

PDF

35.9 KB Created: 2021-07-01 15:15:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 90eb436a19776dc49605106d5368eea3 SHA-1: 5d7e64876d5e57a8a31883573238f52722dd8ec1 SHA-256: 446b3e7a58a681e58958b02e1c33102a67153465af326804693e043f0aa9458a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically advertising free game hacks and generators. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the malicious nature of these links. The document body, though partially corrupted, contains similar lure text and URLs, reinforcing the phishing attempt. No scripts were extracted, but the primary attack vector is the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-hutt-cartel-tatooine-free-game-hack In PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-fbi-open-up_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/easy-robux-generator_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/pubg-75-uc_GM1330123889.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/40-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/hack-para-hacker-todo-roblox-pastebin_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-speed-hack-in-roblox-booga-booga_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/boku-no-roblox-hack-script-auto-farm_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/mario-64-roblox-rom-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-p-astebin_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-free-noob-outfits_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/huong-dan-tai-hack-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/robux-hack-guaranteed-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-no-waiting-pastebin_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-hack-roblox-games-nice-and-quickly_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/does-roblox-sense-cheat-engine_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_off000034d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34D0 22716 bytes
SHA-256: e20fca201e3348797b3716d490e41513579287c11d3f2c9d6076b03d27a9ee4f
font_01_sfnt_off00006793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6793 19012 bytes
SHA-256: 182da63cac5457928263ef4ac8182109bdd43325b63a1d2d8dded7f77341ad23

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