Malicious PDF — malware analysis report

Static analysis result for SHA-256 978911785a6b8efa…

MALICIOUS

PDF

49.0 KB Created: 2021-06-03 19:03:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 450e5380633faf9a983393c81c0ceb3d SHA-1: ab8e5fb0608f2190fa7d0ac4dd57fa43f56fc225 SHA-256: 978911785a6b8efa94960633f01a308ec5012b1f2a522917827391f6dfcef51f
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous links to external websites, many of which are SEO-optimized and related to hacking or game exploits. The document body and extracted URLs suggest a lure to download potentially malicious content disguised as game hacks or account information. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.online/app/431946152/how-to-hack-a-roblox-user-account-password-2021-game-hack PDF link annotation
    • http://www.flytec.com.py/download/files/minecraft-maps-pe-free-download_GM479516143.pdfIn PDF document text
    • http://www.flytec.com.py/download/files/minecraft-pe-017-0-apk-free-download-android_GM479516143.pdfIn PDF document text
    • http://www.flytec.com.py/download/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.flytec.com.py/download/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://www.flytec.com.py/download/files/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.flytec.com.py/download/files/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://www.flytec.com.py/download/files/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://www.flytec.com.py/download/files/minecraft-112-2-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.flytec.com.py/download/files/with-pokemon-go-free-download_GM1094591345.pdfIn PDF document text
    • http://www.flytec.com.py/download/files/roblox-free-draw_GM431946152.pdfIn PDF document text
    • http://www.flytec.com.py/download/files/free-roblox-account-generator_GM431946152.pdfIn PDF document text
    • http://www.flytec.com.py/download/files/free-minecraft-packs_GM479516143.pdfIn PDF document text
    • http://www.flytec.com.py/download/files/how-to-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.flytec.com.py/download/files/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://www.flytec.com.py/download/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.flytec.com.py/download/files/best-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.flytec.com.py/download/files/minecraft-pe-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://www.flytec.com.py/download/files/tiktok-likes-for-free_GM835599320.pdfIn PDF document text
    • http://www.flytec.com.py/download/files/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://www.flytec.com.py/download/files/free-robux-gen_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050d4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50D4 28232 bytes
SHA-256: 6168a50b520cc8c861b1c2ebe4add12f4b473888beaca10a5b7baa75b0af9c46
font_01_sfnt_off00008f1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F1E 2872 bytes
SHA-256: 5a38050e56bfed6ba013c4835499ae05f4b57b22e606c9172dd4bc2ae7fd1207
font_02_sfnt_off000098da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98DA 19504 bytes
SHA-256: efa31a406ec5a60d66e2325037304dcff7865f303507289630369c753359fc7c

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