Malicious PDF — malware analysis report

Static analysis result for SHA-256 374f559f2627f64a…

MALICIOUS

PDF

32.4 KB Created: 2021-07-20 03:11:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5b15e5e43af72f92820a866ba55687ef SHA-1: d70fd256163405b942da7c8c4728b34e130053e9 SHA-256: 374f559f2627f64a47b096d012b358643926265c53661360b42f0e3edc236118
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains embedded links that redirect to a known malicious domain, masquerading as a generator for free game currency. The document body and heuristics indicate a lure for game-related cheats or currency, which is a common social engineering tactic. The presence of multiple related URLs suggests a campaign distributing these lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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 http://netcdn.tw/app/431946152/free-robux-not-fake-game-hack In PDF document text
    • https://successfulauto.ru/images/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://successfulauto.ru/images/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • https://successfulauto.ru/images/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://successfulauto.ru/images/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://successfulauto.ru/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://successfulauto.ru/images/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://successfulauto.ru/images/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • https://successfulauto.ru/images/roblox-hack_GM431946152.pdfIn PDF document text
    • https://successfulauto.ru/images/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • https://successfulauto.ru/images/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002827.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2827 22872 bytes
SHA-256: c4920467d556d680559656ace3341836b4435de6d94232d209ea278a68157cdc
font_01_sfnt_off00005b51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B51 18700 bytes
SHA-256: 63c9335a4adc4e13574000769c24cfa85aa9e1cd85ca076c26101e8843d87216