Malicious PDF — malware analysis report

Static analysis result for SHA-256 576e855fb7da0c04…

MALICIOUS

PDF

40.4 KB Created: 2021-05-10 11:48:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 525c36c86a4b6d942152b501611c2eee SHA-1: a78f0fdaa60bbbbc56134f04775ae176dcdb03fa SHA-256: 576e855fb7da0c041708639ba96e3491a6befbb471c9dbb92bee7f6ec3397937
218 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating a lure for malicious redirection, specifically referencing a 'free generator / game hack'. It includes embedded URLs pointing to suspicious domains, which are likely used to host or redirect to malicious content. The document body, though partially corrupted, contains text related to Minecraft servers and a generator, reinforcing the lure. No scripts were extracted, but the presence of malicious redirector links suggests an attempt to lead the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/how-to-make-a-modded-minecraft-server-for-free-game-hack In PDF document text
    • https://playhack.in/minecraftIn 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_003_off000037fc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37FC 25492 bytes
SHA-256: ddb6a69488c03d88a1041e613efaf725d4856639c23a8f54f4f30175ad97d509
font_01_sfnt_off00007271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7271 2892 bytes
SHA-256: c2578a292634a901613c1dd9f9883dd4930e6811e59ae03d696f263e56ea17b4
font_02_sfnt_off00007c5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5B 18332 bytes
SHA-256: 59959101681fb4a2744844bcdf3902b1567deffd11dd3ddee6423be8a335a742

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