Malicious PDF — malware analysis report

Static analysis result for SHA-256 f748c0f3d26ee7e1…

MALICIOUS

PDF

38.7 KB Created: 2021-05-21 20:04:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: c6ae6d4d1f56b7f32c4e500c59aeb53d SHA-1: 7850e3560a4124520c062d04496e34537a54c131 SHA-256: f748c0f3d26ee7e1331c1727f592398f5c9ade824f0189e7d9bd753c883b8356
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains, identified by heuristics as malicious. The document body and embedded artifacts suggest a lure related to 'free Robux' or game hacks, aiming to trick users into clicking these malicious links. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9476

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/free-robux-websites-2021-game-hack In PDF document text
    • https://www.modestuae.com/uploaded_files/userfiles/files/coin-master-online-hack-link_GM406889139.pdfIn PDF document text
    • https://www.modestuae.com/uploaded_files/userfiles/files/get-robux-today_GM431946152.pdfIn PDF document text
    • https://www.modestuae.com/uploaded_files/userfiles/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.modestuae.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-for-iphone_GM406889139.pdfIn PDF document text
    • https://www.modestuae.com/uploaded_files/userfiles/files/minecraft-bedrock-edition-pc-free_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003479.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3479 28012 bytes
SHA-256: e71d32e5caa90bcd3896ffa7820d90314cb6904b38654e1080a645727b116b07
font_01_sfnt_off00007418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7418 18836 bytes
SHA-256: ef44fc6ccc8558fc54da3394cf76e38d99de94399ef86c3bb36f5b939f331685

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