Malicious PDF — malware analysis report

Static analysis result for SHA-256 445c1196cad4544e…

MALICIOUS

PDF

41.0 KB Created: 2021-05-24 03:54:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 2f3fc8b685b1997bea85cca1f1345583 SHA-1: 72bd175ee0c62523ef01cc00436988886f2201ab SHA-256: 445c1196cad4544e52b0992d0f13b2a6ff615904dfc46f0c43fb922f26db93e4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links that redirect to a known malicious domain, masquerading as a 'free Robux generator' and 'game hack'. The document body and heuristics confirm the use of a lure to entice users to click these links. While no scripts were directly extracted, the PDF structure and embedded URLs strongly suggest a phishing or redirection attack designed to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7445

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-generator-no-human-verification-game-hack In PDF document text
    • http://porownaj-laser.pl/images/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://porownaj-laser.pl/images/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://porownaj-laser.pl/images/how-to-get-free-skins-in-roblox_GM431946152.pdfIn PDF document text
    • http://porownaj-laser.pl/images/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://porownaj-laser.pl/images/coin-master-free-spins-2021_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
stream_002_off0000354e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x354E 26284 bytes
SHA-256: c6b4e747c2da3a5dd33a25d2c6a3b00376ca6f305df943fce34df369ce91f10c
font_01_sfnt_off0000735c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x735C 2844 bytes
SHA-256: baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
font_02_sfnt_off00007d1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D1D 18860 bytes
SHA-256: f1337887e63f46ec65b145f76804780e669468724c6330ac6fa0452b843b30d3

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