Malicious PDF — malware analysis report

Static analysis result for SHA-256 543821873d84930c…

MALICIOUS

PDF

40.9 KB Created: 2021-05-22 01:43:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 2dee264433ba138ee2fa2d30cae1a846 SHA-1: eda449574994b733c49325e916f84692025f4b8a SHA-256: 543821873d84930c62f743d31c5c11067348473fb79c7493fc17944d609997f0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, with one critical heuristic identifying it as a malicious redirector lure for a "free generator / game hack". The document body, though heavily obfuscated, contains similar URLs and text related to free game hacks. The presence of embedded URLs and the nature of the lure suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7499

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/479516143/can-you-play-minecraft-for-free-game-hack In PDF document text
    • http://www.maranata4x4.co.za/images/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • http://www.maranata4x4.co.za/images/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://www.maranata4x4.co.za/images/minecraft-jar-free_GM479516143.pdfIn PDF document text
    • http://www.maranata4x4.co.za/images/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdfIn PDF document text
    • http://www.maranata4x4.co.za/images/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000037d6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37D6 27424 bytes
SHA-256: 6c8c9ce7212e2545a8c24125e8a0b8db7190278e9426d230ec35372b53c24207
font_01_sfnt_off000073a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73A5 3056 bytes
SHA-256: dd24a0ab94df4552e459bd06fd01b0fd3f021c1d51d1d64407070e735974a028
font_02_sfnt_off00007e18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E18 18420 bytes
SHA-256: 81bede04d90c080fa29d20db124f1531358f39ee91ce610139dedd08dc3401fc

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