Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b7ccf7e1f063574…

MALICIOUS

PDF

39.4 KB Created: 2021-05-23 23:40:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7ae85386973244cbcc171edfe47615d0 SHA-1: 560bca9ce9aa4e057e8406dfc89721789e274f00 SHA-256: 6b7ccf7e1f063574a876859c3d5a8dc22f4529a074e96eef049bafcd1e3bd810
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links pointing to known malicious redirector infrastructure, specifically advertising 'free Robux' or 'game hacks'. The heuristic firings confirm these links lead to malicious redirectors and a lure for game hacks. The document body, though partially corrupted, also contains references to these lures and URLs. The presence of embedded URLs and the ML classifier's output further support the malicious nature of this document.

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/431946152/free-robux-cards-game-hack In PDF document text
    • https://d-fankhauser-metallbau.ch/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://d-fankhauser-metallbau.ch/images/free-robux-net_GM431946152.pdfIn PDF document text
    • https://d-fankhauser-metallbau.ch/images/coin-master-ios-gods-hack_GM406889139.pdfIn PDF document text
    • https://d-fankhauser-metallbau.ch/images/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • https://d-fankhauser-metallbau.ch/images/download-coin-master-free-spins-link-2021-today_GM406889139.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
font_00_sfnt_off00003253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3253 26876 bytes
SHA-256: c9c8203612951f60dfd955ed5f9183937e638fa8bdca0f4b0b9a7c78c37b003d
font_01_sfnt_off00006df6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF6 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off00007806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7806 18416 bytes
SHA-256: 79c56a0f23d4fc34690a575a065be14b64911c3c5a3331038291264b4b7107af

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