Malicious PDF — malware analysis report

Static analysis result for SHA-256 841c3c1a0a8e8702…

MALICIOUS

PDF

38.6 KB Created: 2021-05-21 22:41:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0a67afe49fd446f4c62a2f6d274094fb SHA-1: acc0ad4c150f04015e425ccc4d4000d0887901b9 SHA-256: 841c3c1a0a8e87024185f61cd1be4423321564e5bedb7a321f600ff74c236f00
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacking ('how-to-get-free-coins-on-coin-master-game-hack') and embeds multiple external URLs. One of these URLs, https://netcdn.xyz/app/406889139/how-to-get-free-coins-on-coin-master-game-hack, is flagged as a redirector for game hacks. The ML classifier also identified the PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a phishing or redirection attempt to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/how-to-get-free-coins-on-coin-master-game-hack PDF link annotation
    • https://dirigentigiustizia.it/images/how-to-make-clothes-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-free-spins-instagram_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/what-do-roblox-points-do_GM431946152.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_off00003494.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3494 24424 bytes
SHA-256: a636ea78d8a8692e80a62ae10336084e3c6e4c301ec7ef0ba994a0fe526b82df
font_01_sfnt_off00006cab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CAB 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00007691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7691 17872 bytes
SHA-256: 51f02da227d0679d4a4cca1b372203100e5a9ff6587b3c267ccf786d3222cbcf

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