Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab59de88aba7f54f…

MALICIOUS

PDF

39.4 KB Created: 2021-05-10 11:13:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: dd2739d11c068a166ac45ada44905f0b SHA-1: a4afa24c0f2d0e011dd204fee89d960770329fc0 SHA-256: ab59de88aba7f54f12a42eec50c44d67d9c119d3bc0332ce6e9f937a09c33d2d
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple critical heuristic firings indicating it links to malicious redirector infrastructure, specifically a 'game hack' lure. The embedded URL leads to a known malicious domain, likely intended to trick users into downloading a malicious payload. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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/coin-master-pet-food-hack-game-hack In 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_off000035fd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35FD 24784 bytes
SHA-256: e8caa42889d81dc35f89adc7ba1ff3ef02f855dd5b9c8af6bef701e2b71e9651
font_01_sfnt_off00006ec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC6 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off000078b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78B1 18208 bytes
SHA-256: e18efbdce36ef150d5aaea8ad3152999d2cd8d64b44f09ee0731d2d38d7a34d6

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