Malicious PDF — malware analysis report

Static analysis result for SHA-256 7df485a4fd7765df…

MALICIOUS

PDF

39.3 KB Created: 2021-05-21 13:30:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 5ca6adb1f0adec44fcaa7e861a5fa2b7 SHA-1: bba66d3452fdef71b3755fdc1648dfc813c3c942 SHA-256: 7df485a4fd7765dfe4a88c9a6950939e354efa32cd730f4715d984c00b0d5090
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links that redirect to websites offering game hacks and generators, a common lure for malicious content. The ML classifier strongly flagged this PDF as malicious, and heuristic rules identified it as a redirector link. While no scripts were explicitly extracted, the PDF structure itself facilitates these malicious redirects, likely intended to lead users to further malicious downloads or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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/431946152/roblox-hack-download-pc-game-hack In PDF document text
    • http://coplaltd.eu/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://coplaltd.eu/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://coplaltd.eu/images/roblox-download_GM431946152.pdfIn PDF document text
    • http://coplaltd.eu/images/how-to-get-free-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • http://coplaltd.eu/images/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003152.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3152 26720 bytes
SHA-256: e52577daec61bc7baf405478883e0de4aa9397ebc89b374ea73b32a645d523c5
font_01_sfnt_off00006ed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED5 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off000078bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78BF 18844 bytes
SHA-256: 78e662fc8066b17092395b08137e99af0342e3f29fa403ad8e1f9446b0d64eeb

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