Malicious PDF — malware analysis report

Static analysis result for SHA-256 4623d0a74c59d8fd…

MALICIOUS

PDF

38.3 KB Created: 2021-05-23 21:35:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 35e6c332167a730b0bad78c80baceced SHA-1: 08b251ee1841ed70b595652a996e9eed046e42ec SHA-256: 4623d0a74c59d8fda881db6affd3d58df2379b6aef22bdbe8bf526a0d6833cfa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a known malicious infrastructure, specifically promoting 'game hacks' and 'free spins' for Coin Master. The document body and heuristics confirm this lure, aiming to trick users into visiting potentially harmful websites. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9407

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-free-spins-link-blogspot-2021-game-hack In PDF document text
    • https://shimony.net/images/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://shimony.net/images/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://shimony.net/images/100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://shimony.net/images/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • https://shimony.net/images/free-roblox-hack_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000037d5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37D5 25148 bytes
SHA-256: 3d459c7a71b29865521f62729e1447b7d2978e4637c6ceb7fa1846f641134eb2
font_01_sfnt_off00007209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7209 19036 bytes
SHA-256: a1db0e26d638f2546736f1f7b434dee98a1c5e726f40723477b7c203db66759e

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