Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8487ee5a3470a36…

MALICIOUS

PDF

35.6 KB Created: 2021-05-20 17:47:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 758a9f2ad69ad3371cdfb1bca78b17cd SHA-1: 5922025c774634885eba24d25573a382fcabd2ae SHA-256: a8487ee5a3470a3682bc7a8455383f9df2e8cc425938e5f59cb8f570a7928eda
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, masquerading as free game hacks and generators. The ML classifier also flagged the document as malicious. The presence of embedded URLs and the lure of free items suggest a phishing or scam attempt, likely leading to further malware download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/free-minecraft-com-game-hack In PDF document text
    • http://lechia-sedziszow.pl/images/roblox-free-draw_GM431946152.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/coin-master-hack-review_GM406889139.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/how-do-u-hack-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_off000031f8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31F8 25204 bytes
SHA-256: b05de64d6113d2ec5d6656e240ee00b57462c0fa4001d3c9680ee8e871f45589
font_01_sfnt_off00006b0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B0B 17968 bytes
SHA-256: 1b4885c2af39899205e5d90bbae948db42423f4b52ef91d34878d66166ac5d9f

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