Malicious PDF — malware analysis report

Static analysis result for SHA-256 25f0f3c307bc6012…

MALICIOUS

PDF

39.3 KB Created: 2021-05-21 14:01:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3932ca04a91485581121dd582fdcce73 SHA-1: 0bb5bf02484109d544a9715a837eb2c96829ad40 SHA-256: 25f0f3c307bc601290d488f4ba8873971242613e9e2cf998e9502e8ec9e82df1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting a 'Coin Master Hack'. The heuristic firings indicate that these links are associated with known malicious redirectors and lure users with game-related cheats. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest a phishing or social engineering attack aimed at driving traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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-hack-xyz-game-hack In PDF document text
    • http://www.colma.it/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.colma.it/images/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • http://www.colma.it/images/real-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://www.colma.it/images/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://www.colma.it/images/free-coin-coin-master_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_off00003452.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3452 25944 bytes
SHA-256: a072a966d2081537437278cf0e5abef807e9c3b26209570fff54e109a4c66946
font_01_sfnt_off00006e5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E5A 2868 bytes
SHA-256: d2d857e2ddc1082c7667b23f2135a5c0ba26a2ff8b42c86c89c8e0b09aece855
font_02_sfnt_off00007844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7844 18204 bytes
SHA-256: eb378c11d4c3edf43fd4a317fe896922564aeaa66921672c4d59ab66e1a3bbf9

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