Malicious PDF — malware analysis report

Static analysis result for SHA-256 454cff473f27bcdc…

MALICIOUS

PDF

42.7 KB Created: 2021-05-22 05:08:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: fca4502a5296854bc8c75dfa12d0a922 SHA-1: 59e528423f72d63285c5aa5a05b80ad4893329c7 SHA-256: 454cff473f27bcdc61ebab4b3bd3fbd55a3f2ced9cc264831623402ef999879d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and potentially malicious content, disguised as game hacks and free currency generators. The heuristic firings indicate that the PDF is designed to lure users to malicious infrastructure. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to download further malicious content or visit phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7429

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/431946152/robux-free-com-game-hack In PDF document text
    • http://www.mathershydraulics.com.au/static/userfiles/files/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • http://www.mathershydraulics.com.au/static/userfiles/files/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • http://www.mathershydraulics.com.au/static/userfiles/files/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://www.mathershydraulics.com.au/static/userfiles/files/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://www.mathershydraulics.com.au/static/userfiles/files/minecraft-116-apk-download_GM479516143.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_off0000356b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x356B 28896 bytes
SHA-256: fe3ccc92907547e09cc67138f49b409c9ea7075e72ad4aadffc61a373b60b3bc
font_01_sfnt_off000078bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78BF 4044 bytes
SHA-256: 5196410bcdfc72ecb4ad7d922073bb6d34bf55d37084e4ffe688bf66f2d13d53
font_02_sfnt_off000085e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85E8 18276 bytes
SHA-256: 0fd65c317a1abc649e3faff400e4768e1aa7d1dd6ac5589c15474ffa47aab2c1

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