Malicious PDF — malware analysis report

Static analysis result for SHA-256 50f2d1d903f7010a…

MALICIOUS

PDF

37.6 KB Created: 2021-05-21 21:52:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c2f99e66456adf4b940d2040f0e8b930 SHA-1: 5e76d6311a8b4d870380e3a69823e211c7581169 SHA-256: 50f2d1d903f7010a211cdcf0f4eebf223b3920e0b4ccfcc859979fb50c4e0a68
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically advertising a "free generator" for TikTok followers. The document body and heuristics confirm a lure designed to entice users to click through to a potentially harmful site. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7010

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/835599320/get-free-followers-on-tiktok-game-hack In PDF document text
    • http://www.visiblefilm.com/images/coin-master-free-spins-link-quora_GM406889139.pdfIn PDF document text
    • http://www.visiblefilm.com/images/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://www.visiblefilm.com/images/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/free-coins-2021-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.visiblefilm.com/images/how-to-hack-a-minecraft-account_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_off0000319f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x319F 24304 bytes
SHA-256: ea9382c599e665e7a902ce400b32c6412bb4f30f38b8144a13488496d3f47fd2
font_01_sfnt_off0000694a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x694A 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00007330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7330 17692 bytes
SHA-256: 927e39851add4dfd479e94c7f363911e27b11f2d7b93d82bb30fff9f618b2f9d

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