Malicious PDF — malware analysis report

Static analysis result for SHA-256 56e3edf151beecb2…

MALICIOUS

PDF

43.9 KB Created: 2021-06-13 21:27:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 069da9e82716e30d358ac563a2391c31 SHA-1: 43c904fe297c5335a09d9a41a907d4cfaddc0cc2 SHA-256: 56e3edf151beecb21f609a4416e100d870237a622863834f73163dc88d1bd602
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to external websites, many of which are associated with malicious redirectors and SEO link farms. The primary lure appears to be related to game hacks and free in-game currency, such as Robux. The document's structure and embedded links suggest an attempt to drive traffic to potentially malicious or scam-related content, likely as a precursor to further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/how-to-make-your-own-game-with-free-robux-2021-game-hack In PDF document text
    • http://heilzentrum-ulm.de/images/roblox-free-face-accessories_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-to-hack-through-walls-on-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-to-hack-on-roblox-jailbreak-into-police_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-to-get-free-money-in-roblox-rocitizens_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-to-hack-roblox-windows-7_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/app-store-games-free-download-roblox_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-roblox-clothes-and-hair-girl_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/como-tener-robux-gratis-sin-hack-ni-admin_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/all-of-the-free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/pubg-uc-rate-in-india_GM1330123889.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-stuff-on-roblox-on-phone_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/hacker-man-roblox-script_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-robux-no-humen-varucashe_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_off000049b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49B4 25636 bytes
SHA-256: 6e4c8ada84f40810177df52ca07f46b35a035e042630e945aab6646644aad148
font_01_sfnt_off000083f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83F2 20184 bytes
SHA-256: 8780b05ca2c2efcfa9e6fdeb555ae89abb14649bdc0871ad67890c3aecd689fa

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