Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0b59556dee057e9…

MALICIOUS

PDF

39.8 KB Created: 2021-05-10 17:11:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 3094e64b234e0ebadb986e0ee6aa2b00 SHA-1: b723121b6ec097a78b54958b3dfcf86a2d73f611 SHA-256: f0b59556dee057e9681daa092406a9027c1fdd021e7503e331909e3d53400dfa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and game hack lures, indicating a phishing or scam attempt. The heuristic firings confirm the presence of malicious redirector links and a lure for game hacks. The document body, though heavily obfuscated, contains references to game-related terms and URLs, reinforcing the lure. No scripts were extracted from this sample, but the embedded links are the primary mechanism for delivering the malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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-dominus-free-game-hack In PDF document text
    • http://alexandergroep.nl/images/coin-master-hack-spins-ios_GM406889139.pdfIn PDF document text
    • http://alexandergroep.nl/images/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://alexandergroep.nl/images/weird-roblox_GM431946152.pdfIn PDF document text
    • http://alexandergroep.nl/images/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://alexandergroep.nl/images/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • http://alexandergroep.nl/images/coinmaster-free-cards_GM406889139.pdfIn PDF document text
    • http://alexandergroep.nl/images/free-minecraft-account-and-password-generator_GM479516143.pdfIn PDF document text
    • http://alexandergroep.nl/images/minecraft-free-version-pc_GM479516143.pdfIn PDF document text
    • http://alexandergroep.nl/images/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://alexandergroep.nl/images/free-exploits-for-roblox_GM431946152.pdfIn PDF document text
    • http://alexandergroep.nl/images/minecraft-free-demo_GM479516143.pdfIn PDF document text
    • http://alexandergroep.nl/images/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://alexandergroep.nl/images/rbx-roblox-robux_GM431946152.pdfIn PDF document text
    • http://alexandergroep.nl/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://alexandergroep.nl/images/free-robux-microsoft_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_off00004064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4064 24332 bytes
SHA-256: d780d136415dcd2f99ca96e6007f1e23506d3820bb7315b6f159f8398c611883
font_01_sfnt_off00007874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7874 18636 bytes
SHA-256: 091f137b67372388e813b4829387741adcd96f5962df99b77f49d4626ee6ae86

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