Malicious PDF — malware analysis report

Static analysis result for SHA-256 79c5e3b8e03e684f…

MALICIOUS

PDF

41.9 KB Created: 2021-05-22 10:41:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 548f5b246c6d0074d150cad5985c0671 SHA-1: 0275025ae1d7375d78142e0ea281d1d8eb7f89b7 SHA-256: 79c5e3b8e03e684fb9b4d0ea11ea8a0ab29378a5fba50dc9e70a342fb732ecd7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, masquerading as 'free generators' or 'game hacks'. The document body and heuristics indicate a lure designed to entice users to click these links. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7527

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-without-verification-2021-game-hack In PDF document text
    • http://5prudov.ru/images/free-minecraft-mods-for-ps4_GM479516143.pdfIn PDF document text
    • http://5prudov.ru/images/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://5prudov.ru/images/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://5prudov.ru/images/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • http://5prudov.ru/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_off0000336f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x336F 29136 bytes
SHA-256: 4daadbc8e90bad947daafe853c65c9a8932e6f0b2098fe677afe8ae8441e26ce
font_01_sfnt_off0000723a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x723A 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00007f4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4B 19368 bytes
SHA-256: a82984a519d7edf94c6531cfcf7f8df3cbe602e214b877051ae5dee029c294bf

Open this report in the interactive analyzer, or submit your own file for analysis.