Malicious PDF — malware analysis report

Static analysis result for SHA-256 97541c5bf7462c86…

MALICIOUS

PDF

47.3 KB Created: 2021-06-09 10:16:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 71432dfc46a693dffce2b7132e3cbd35 SHA-1: 86612a7de7aef9af8008d92b599086ed5e03f25a SHA-256: 97541c5bf7462c860586539ef1e2373604e7fcde1aa3163cb55a3e47fae12163
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO manipulation tactic. The document body and extracted URLs indicate a lure related to 'hacking for Robux' or similar game-related cheats. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URIs suggest potential for malicious content delivery or redirection, possibly leveraging embedded JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 4

  • 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
  • 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.tw/app/431946152/how-to-hack-for-robux-on-pc-2021-game-hack PDF link annotation
    • http://hk-kan.org/images/free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/roblox-build-a-boat-free-plane-codes_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/coin-master-free-spins-hacktman_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/aincrad-online-free-beta-roblox_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/delta-roblox-hack-buy_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/free-roblox-items-codes_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/apoc-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/how-to-get-free-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://hk-kan.org/images/coin-master-free-attack-hack_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f8e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F8E 26072 bytes
SHA-256: 8b224950fd119ff5126126037d95e61471d6f49df104045b831a7695d187d34b
font_01_sfnt_off000089e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89E6 2872 bytes
SHA-256: 5a38050e56bfed6ba013c4835499ae05f4b57b22e606c9172dd4bc2ae7fd1207
font_02_sfnt_off000093a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93A2 19132 bytes
SHA-256: 83f5b3aa7d8837d85ec28868a2661287792854e3dd4de70cceec71e312e26a0e

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