Malicious PDF — malware analysis report

Static analysis result for SHA-256 c52f614c854b404e…

MALICIOUS

PDF

32.5 KB Created: 2021-07-20 00:11:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 26b30925399a4f357a6d63c6a6c4a5cf SHA-1: 6a849788f2d0b912e2b791fef7632f2396fd66fd SHA-256: c52f614c854b404e1f5c10d1eb2c91904aee07bd4954c1a27d38b2d9cfcb2c7b
160 Risk Score

Malware Insights

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

The PDF document contains multiple embedded links that redirect to websites offering game hacks and generators, such as 'how-to-hack-a-roblox-account-easy-game-hack'. These links are flagged as malicious redirectors, indicating a likely attempt to lure users to malicious sites for malware delivery or phishing. The document body and heuristics strongly suggest a social engineering tactic to exploit user interest in free in-game items or cheats.

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/how-to-hack-a-roblox-account-easy-game-hack In PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/how-to-get-tiktok-famous-free_GM835599320.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/how-to-get-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/free-coin-master-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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002a99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A99 21716 bytes
SHA-256: cacac9839bd89ecc4168b6cdf8fe8e388007473abb4a567ff0e1560cdf3d8051
font_01_sfnt_off00005a75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A75 18956 bytes
SHA-256: 6b48a3217c7bcc7f5da290e5b055d91e1ce12a3bd260c7f67175daec744aae47

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