Malicious PDF — malware analysis report

Static analysis result for SHA-256 d57c3086a8a2f8b9…

MALICIOUS

PDF

41.4 KB Created: 2021-05-14 07:07:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 0c895f6f1fb20ddf02a4458b404f96db SHA-1: ad6261d0d44d548d6e48a2406dfdc6fca7e89a88 SHA-256: d57c3086a8a2f8b93b014a0d24440f64cb57bd9856bae65792a71dc7872282b2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, masquerading as game hacks and generators. The document body, though heavily obfuscated, contains references to these lures and embedded URLs. The primary attack pattern observed is the use of social engineering to trick users into visiting malicious sites, likely for further malware delivery or phishing. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/coin-master-game-hack-apk-game-hack In PDF document text
    • http://pwpyemen.org/images/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • http://pwpyemen.org/images/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://pwpyemen.org/images/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/coin-master-free-spins-heaven_GM406889139.pdfIn PDF document text
    • http://pwpyemen.org/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/card-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pwpyemen.org/images/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/rbxdemon_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/coin-master-computer-hack_GM406889139.pdfIn PDF document text
    • http://pwpyemen.org/images/coin-master-link_GM406889139.pdfIn PDF document text
    • http://pwpyemen.org/images/pasos-para-hackear-coins-master_GM406889139.pdfIn PDF document text
    • http://pwpyemen.org/images/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/free-minecraft-packs_GM479516143.pdfIn PDF document text
    • http://pwpyemen.org/images/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/free-face-roblox_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pwpyemen.org/images/free-roblox-pin-codes_GM431946152.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
stream_003_off000047d4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47D4 24380 bytes
SHA-256: 15d64901debefe636771e7a1cf9474bb79502372dd464b7a8c9946816027dc64
font_01_sfnt_off00007fb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB9 18152 bytes
SHA-256: a9beebf818d5886f30c9f2ca3dea49ae6ba882c6c1da3ca8fee2aac0910a50ab

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