Malicious PDF — malware analysis report

Static analysis result for SHA-256 35f83edd1ccfac86…

MALICIOUS

PDF

38.8 KB Created: 2021-05-22 09:19:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: a42f81128920625c5e2c131a04ff2812 SHA-1: 50b05107f28a420b3e76872a2262d1cf322d6826 SHA-256: 35f83edd1ccfac86baefc292cedd719ef15e64e6b0d941a703cb0de95adcb50c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs that point to redirectors and pages related to game hacks and free currency generators, indicating a social engineering lure. The heuristic firings confirm the presence of malicious redirector links and a general lure for game hacks. While no scripts were explicitly extracted, the nature of the embedded URLs suggests a workflow designed to lead the user to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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/free-spin-coin-master-2021-link-game-hack In PDF document text
    • http://cacpglobal.ca/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://cacpglobal.ca/images/coins-master-hack_GM406889139.pdfIn PDF document text
    • http://cacpglobal.ca/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://cacpglobal.ca/images/is-tiktok-free-app_GM835599320.pdfIn PDF document text
    • http://cacpglobal.ca/images/free-robux-script_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_off000031fa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31FA 24884 bytes
SHA-256: b9891146bece49b040d5d3c818275c74bcccfa395729b1dc9a6b3c1ab8bea5ba
font_01_sfnt_off00006b7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B7D 2868 bytes
SHA-256: d2d857e2ddc1082c7667b23f2135a5c0ba26a2ff8b42c86c89c8e0b09aece855
font_02_sfnt_off00007567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7567 18456 bytes
SHA-256: 7500aca679d0fadfbda1e17cf023a195ee80a601fef81e7f7ced8cf50182af56

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