Malicious PDF — malware analysis report

Static analysis result for SHA-256 5364faf281d6864c…

MALICIOUS

PDF

41.5 KB Created: 2021-05-16 19:30:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 481d90127f7bfff51aeb8f155a663d33 SHA-1: 2875cbaab02e0d4241a4cca550a92f94c409f9b8 SHA-256: 5364faf281d6864c44cfb231a3d10575510af7ee2c1b6d834d38062a7f9c2f20
220 Risk Score

Malware Insights

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

The PDF document contains multiple links to known malicious redirectors and a large number of external PDF links, suggesting a lure for game hacks or generators. The ML classifier strongly indicated maliciousness. The document body and embedded links indicate a likely attempt to redirect users to potentially harmful content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/clean-master-free-coins-and-spins-game-hack In PDF document text
    • https://pa-pangkalpinang.go.id/images/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • https://pa-pangkalpinang.go.id/images/roblox-play-as-guest-free_GM431946152.pdfIn PDF document text
    • https://pa-pangkalpinang.go.id/images/fbchampion_GM406889139.pdfIn PDF document text
    • https://pa-pangkalpinang.go.id/images/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://pa-pangkalpinang.go.id/images/how-to-hack-coin-master-android_GM406889139.pdfIn PDF document text
    • https://pa-pangkalpinang.go.id/images/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • https://pa-pangkalpinang.go.id/images/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://pa-pangkalpinang.go.id/images/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://pa-pangkalpinang.go.id/images/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://pa-pangkalpinang.go.id/images/coin-master-free-spins-glitch_GM406889139.pdfIn PDF document text
    • https://pa-pangkalpinang.go.id/images/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • https://pa-pangkalpinang.go.id/images/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://pa-pangkalpinang.go.id/images/free-admin-roblox_GM431946152.pdfIn PDF document text
    • https://pa-pangkalpinang.go.id/images/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://pa-pangkalpinang.go.id/images/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://pa-pangkalpinang.go.id/images/free-coins-coin-master-today_GM406889139.pdfIn PDF document text
    • https://pa-pangkalpinang.go.id/images/is-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://pa-pangkalpinang.go.id/images/android-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://pa-pangkalpinang.go.id/images/coin-master-free-coins-amp_GM406889139.pdfIn PDF document text
    • https://pa-pangkalpinang.go.id/images/websites-that-give-free-robux_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_off0000496b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x496B 24164 bytes
SHA-256: 1d6fabdb23a7202c7fd8ebadb2e030b248f92cdf2e3227dfcd7ca1e484299484
font_01_sfnt_off00008081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8081 18132 bytes
SHA-256: 1cd25d0b7dc3a8185d8e8b92174428e8871a6a2908bfb4dc1c2b5806b24c5c26

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