Malicious PDF — malware analysis report

Static analysis result for SHA-256 60a46ba7a6247e4c…

MALICIOUS

PDF

34.8 KB Created: 2021-05-21 20:07:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f3d055e2f20349c90d0ba2c48c644a43 SHA-1: 9ec50361ca59f2e46c1c829bbc0fb3486d16d04d SHA-256: 60a46ba7a6247e4c5c8c2ba6cfc5fcb905424a3070975b81b889d881705ed589
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links, with one prominent URL identified as a malicious redirector for a 'game hack' lure. The document body and heuristics indicate a social engineering attempt to trick users into clicking this link, likely leading to further malicious content or downloads. No scripts were extracted, but the presence of embedded URLs and the ML classifier's high confidence score support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9508

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-cards-game-hack In PDF document text
    • https://audev.com/images/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://audev.com/images/coin-master-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • https://www.audev.com/images/coin-master-free-spins-link-facebook-page_GM406889139.pdfIn PDF document text
    • https://audev.com/images/card-hack-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.audev.com/images/coin-master-free-spins-link-blogspot_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_002_off00003003.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3003 24300 bytes
SHA-256: d6061f91c647c44eeeafe4363a083e71b60c57a0974956e8886505f4c2e638a5
font_01_sfnt_off000067a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67A1 17884 bytes
SHA-256: dce98ab1a9f6331dfaabbdd57dacdba92c66b57249d10e9c2a1df39138c2a47b