Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae48cbaf5bca7fc6…

MALICIOUS

PDF

41.1 KB Created: 2021-05-12 11:44:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 18c9dd54588f63bedf79ed72f92f1e18 SHA-1: 72fa220fdec9b264ef7c90da84d42b960f897a3d SHA-256: ae48cbaf5bca7fc6e99dea536ef810ad4fefddaf544fad7106f16d4e667b7203
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting "free generator / game hack" lures. The document body and embedded URLs strongly suggest a social engineering tactic to trick users into visiting potentially harmful sites. No scripts were extracted, but the primary attack vector appears to be user interaction with malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/best-site-for-free-coin-master-free-spins-game-hack In PDF document text
    • http://brusivojimi.com/images/coin-master-hack-online-generator_GM406889139.pdfIn PDF document text
    • http://brusivojimi.com/images/coin-master-free-spins-link-31-march-2021_GM406889139.pdfIn PDF document text
    • http://brusivojimi.com/images/daily-coin-master-free_GM406889139.pdfIn PDF document text
    • http://brusivojimi.com/images/free-face-roblox_GM431946152.pdfIn PDF document text
    • http://brusivojimi.com/images/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://brusivojimi.com/images/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://brusivojimi.com/images/coin-master-hack-online-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://brusivojimi.com/images/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://brusivojimi.com/images/robux-online_GM431946152.pdfIn PDF document text
    • http://brusivojimi.com/images/free-robux-now_GM431946152.pdfIn PDF document text
    • http://brusivojimi.com/images/roblox-sexually_GM431946152.pdfIn PDF document text
    • http://brusivojimi.com/images/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://brusivojimi.com/images/hack-para-coin-master-sin-verification_GM406889139.pdfIn PDF document text
    • http://brusivojimi.com/images/is-coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://brusivojimi.com/images/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://brusivojimi.com/images/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • http://brusivojimi.com/images/roblox-hax_GM431946152.pdfIn PDF document text
    • http://brusivojimi.com/images/coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • http://brusivojimi.com/images/how-to-hack-m-coins-mcpe-master_GM406889139.pdfIn PDF document text
    • http://brusivojimi.com/images/coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004741.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4741 24336 bytes
SHA-256: bba261301024608d251a16cfd4613401f69183ff1e7a00e8c721b91e358fdde7
font_01_sfnt_off00007ed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED9 18104 bytes
SHA-256: 879ff18a357a82badab2459f221a11f7b700cc3f508e85be5618259a1268201a

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