Malicious PDF — malware analysis report

Static analysis result for SHA-256 e33a5f86b2302492…

MALICIOUS

PDF

42.8 KB Created: 2021-05-16 07:39:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 838198dd225c4267eb46a3d1ad5791a2 SHA-1: 6a009d162f3173f2680c9b8edfb6a3bd31290998 SHA-256: e33a5f86b230249264ec953b31ddca391383c36122be90738ab9263d2cb9a06b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to known malicious redirectors, specifically advertising game hacks and rewards. The primary lure, 'Roblox Rewards', directs users to 'https://netcdn.xyz/app/431946152/roblox-rewards-game-hack', which is flagged as malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit users through social engineering, likely leading to further malware downloads or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/431946152/roblox-rewards-game-hack In PDF document text
    • http://korporacjaroma.pl/images/coin-master-hack-cheat-engine_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/coin-master-free-spins-link-quora_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/coin-master-hacked-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/strucid-aimbot_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://korporacjaroma.pl/images/free-spins-for-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://korporacjaroma.pl/images/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/coin-master-com_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/coin-master-spin-and-coins-free_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/coin-master-hack-apk-july-2021_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/coin-master-hack-spins-2021_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/coin-master-hack-xyz-apk-download_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/how-to-get-free-spins-on-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
stream_003_off0000494e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x494E 25988 bytes
SHA-256: 33fea2f976b5d67db321a8566f0d3c61337f0d04f17e7f4ac98e320e7b2a6176
font_01_sfnt_off000084a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84A4 18348 bytes
SHA-256: e746527f818eeec2fed82505c45458a072d0ef9a1f0f70f4e50d0d9e13a60d55

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