Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5b1b5337228c47f…

MALICIOUS

PDF

35.1 KB Created: 2021-06-19 17:53:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 4d2276296e2d78e80b02950ef6b161c9 SHA-1: 6b987d20d11c878aa2ac58d72d5887dd3e1304a2 SHA-256: e5b1b5337228c47f1bee535c7b9e8e5b69c895fa84242a20ed627255807e5fac
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and other PDFs, masquerading as game hacks and cheats to lure users. The primary redirector, http://netcdn.co/app/431946152/cheat-roblox-2021-game-hack, is associated with malicious activity. The document body and heuristics indicate a social engineering tactic to trick users into clicking malicious links, likely leading to further malware downloads or phishing attempts.

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/cheat-roblox-2021-game-hack In PDF document text
    • http://agrao.in/images/free-roblox-gift-code-live_GM431946152.pdfIn PDF document text
    • http://agrao.in/images/free-accounts-to-hack-on-roblox_GM431946152.pdfIn PDF document text
    • http://agrao.in/images/pokemon-go-free-3d_GM1094591345.pdfIn PDF document text
    • http://agrao.in/images/roblox-hack-v6-5_GM431946152.pdfIn PDF document text
    • http://agrao.in/images/pubg-uc-carding-quora_GM1330123889.pdfIn PDF document text
    • http://agrao.in/images/best-free-exploit-roblox-pain-exist_GM431946152.pdfIn PDF document text
    • http://agrao.in/images/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • http://agrao.in/images/roblox-swordpack-t-shirt-free-shipping_GM431946152.pdfIn PDF document text
    • http://agrao.in/images/how-to-get-free-faces-promocodes-on-roblox_GM431946152.pdfIn PDF document text
    • http://agrao.in/images/working-roblox-hacking-dll_GM431946152.pdfIn PDF document text
    • http://agrao.in/images/free-robux-come_GM431946152.pdfIn PDF document text
    • http://agrao.in/images/codes-to-get-free-items-on-roblox_GM431946152.pdfIn PDF document text
    • http://agrao.in/images/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://agrao.in/images/free-boy-roblox-blue-hair-com_GM431946152.pdfIn PDF document text
    • http://agrao.in/images/kazok-how-to-hacked-roblox-account_GM431946152.pdfIn PDF document text
    • http://agrao.in/images/hacker-names-roblox_GM431946152.pdfIn PDF document text
    • http://agrao.in/images/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://agrao.in/images/free-coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://agrao.in/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://agrao.in/images/20-free-spin-link-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_off000030fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30FB 22756 bytes
SHA-256: 6405b364d26c7441cae003aaaad3ba38c025cb6e5146b6ce60f556c03d33d54a
font_01_sfnt_off000063c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C9 19160 bytes
SHA-256: cb4e93772a2802cdf898a2692d8633540257621725959ffc1addeeed88cc6d7c

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