Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8c5027dfae85ae7…

MALICIOUS

PDF

40.8 KB Created: 2021-05-22 01:34:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 2ede3afc8c0326ced9fff284715f3b19 SHA-1: a7908556bcc73242313ce37a8780c240c8a87fb3 SHA-256: b8c5027dfae85ae79f1bfcc074c80bc516d2e81f0657f476802433682c45d07f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, including one that masquerades as a free game hack generator. The document body and embedded links suggest a lure to trick users into visiting potentially harmful websites. While no scripts were extracted, the presence of multiple malicious URLs and the ML classifier's flagging indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7499

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/479516143/free-mods-for-minecraft-pe-game-hack In PDF document text
    • https://www.zagi.hr/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/how-do-you-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://zagi.hr/files/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.zagi.hr/files/tiktok-free-views-website_GM835599320.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_off00003329.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3329 29356 bytes
SHA-256: c13db4e81734bf0ba22a72f49399cdc6ab91a325bf07dcba72eaed5c45311c58
font_01_sfnt_off00007544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7544 2820 bytes
SHA-256: 972979c3a46100cf5f8fd289bc6fbd2496ff75fec0e3f6753648c72ec6eba714
font_02_sfnt_off00007ee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE4 18040 bytes
SHA-256: 55677d50e7f19372d6dfb723d72c398dee248f925afb4425ab44c3bb4ecd28f4

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