Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2e7bba1cfdba64c…

MALICIOUS

PDF

35.3 KB Created: 2021-05-23 10:38:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: ae3aa6996e1e927f4bb638a18fee1c11 SHA-1: e102c1579bf149b5b20dd0ed694d3d55530de589 SHA-256: c2e7bba1cfdba64c3127de027bd6fae863abf14ec5a68973bf1f504799ea6a60
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to what appears to be a malicious redirector infrastructure, disguised as a 'free generator' or 'game hack' lure. The document body reinforces this by mentioning 'Free Spins For Coin Master Game' and a call to action to access a generator. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or redirection attempt, likely to deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9508

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/406889139/free-spins-for-coin-master-game-game-hack In PDF document text
    • http://www.mieczewo.com/images/minecraft-bedrock-client_GM479516143.pdfIn PDF document text
    • http://www.mieczewo.com/images/coin-master-hack-mod-apk-android-1_GM406889139.pdfIn PDF document text
    • http://www.mieczewo.com/images/free-roblox-templates_GM431946152.pdfIn PDF document text
    • http://www.mieczewo.com/images/tiktok-free-online-download_GM835599320.pdfIn PDF document text
    • http://www.mieczewo.com/images/how-to-get-free-gamepasses-on-roblox_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
stream_002_off0000309a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x309A 24588 bytes
SHA-256: 6c5c30087138317d93520ff7bdf285488a98c9f3cf9f091bf5fb2ad422a90448
font_01_sfnt_off000068fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68FC 18148 bytes
SHA-256: 3d9eadf91671033e4331a310c0b0805123b3ad5df85bc8ef5d318b7854ffa5cb

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