Malicious PDF — malware analysis report

Static analysis result for SHA-256 44529dc9a2cf4c58…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 17:31:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: dd5ee2f11caba1392aa39cc6df34bb74 SHA-1: 0d41d7664c13f323012147f07a8b69be153e9c00 SHA-256: 44529dc9a2cf4c58a4c1ece99ce6cd2a93ce87f948b8231ecea55ac9f3c14937
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'cheats'. The document body and embedded URLs suggest a lure for users seeking in-game advantages or free items, which is a common social engineering tactic. The presence of a malicious redirector and links to potentially malicious PDF files indicates an attempt to lead the user to further malicious content or downloads.

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/406889139/coin-master-reward-link-2021-game-hack In PDF document text
    • http://36.94.36.7/elib/repository/tokyo-ghoul-roblox-cheat_GM431946152.pdfPDF link annotation
    • http://36.94.36.7/elib/repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/coin-master-hacks-for-android_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/free-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/coin-master-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/minecraft-kill-aura_GM479516143.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/get-free-robux-kesrer_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/roblox-pokemon-brick-bronze-arcade-hack_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/free-robux-glitch_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/minecraft-app-free-download_GM479516143.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/google-how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/coin-master-34-4-hack_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/free-roblox-redeem-code-generator_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/coin-master-hack-apk-download_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
stream_002_off00002f7d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F7D 22856 bytes
SHA-256: 6b4382e4e210f62a293fee23c054d406f9667febfbdb220abfb873b673e3e6ac
font_01_sfnt_off000062eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62EB 18744 bytes
SHA-256: 9742e917eaee576a08eb7c2de5a8b19b3ef10f2b928cd9d8b8b61d70ae14d143

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