Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7e4654a0e83e46c…

MALICIOUS

PDF

43.2 KB Created: 2021-05-12 18:08:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 53cb0f104724c0add6819aca28880574 SHA-1: 56a8c586c8001945b0ba4d127e46649982dee418 SHA-256: f7e4654a0e83e46c6bc0cf9750a317ca9bbf0b1fb1247d79eb52b7555ecf62d9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and websites offering 'free game hacks' and currency, which is a common lure for phishing or malware distribution. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content, likely as a first stage of a larger attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 https://netcdn.xyz/app/406889139/coin-master-free-spins-iphone-game-hack In PDF document text
    • http://dqdq.pl/images/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://dqdq.pl/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://dqdq.pl/images/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://dqdq.pl/images/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://dqdq.pl/images/coin-master-game-hack-version-download_GM406889139.pdfIn PDF document text
    • http://dqdq.pl/images/instantrobux_GM431946152.pdfIn PDF document text
    • http://dqdq.pl/images/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://dqdq.pl/images/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://dqdq.pl/images/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://dqdq.pl/images/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://dqdq.pl/images/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://dqdq.pl/images/free-roblox-followers_GM431946152.pdfIn PDF document text
    • http://dqdq.pl/images/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://dqdq.pl/images/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://dqdq.pl/images/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://dqdq.pl/images/coin-master-links-that-don-t-expire_GM406889139.pdfIn PDF document text
    • http://dqdq.pl/images/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://dqdq.pl/images/coin-master-free-2021-spin-link-today_GM406889139.pdfIn PDF document text
    • http://dqdq.pl/images/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://dqdq.pl/images/coin-master-unlimited-spins-hack_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_003_off00004c34.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C34 25760 bytes
SHA-256: d0e351a465606b4aa665b33ea0c9b9339f10af79bb7ab2f49bf0eca4b2fe8c19
font_01_sfnt_off00008784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8784 18052 bytes
SHA-256: 7a041e18439e61f25930bd292384183aeabfbba1b3f01f5156e579a6d202eabd

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