Malicious PDF — malware analysis report

Static analysis result for SHA-256 973bc2f91b1bcaae…

MALICIOUS

PDF

43.9 KB Created: 2021-05-15 03:03:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 363ac108acc4412dd91bae33ef174fd6 SHA-1: 097dfd4dc4cf8ca65284af370301493db0a94fc1 SHA-256: 973bc2f91b1bcaae6c13c543500a49183741d2ede90ff68484a6bf300c345689
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and a link farm, suggesting it is designed to redirect users to external sites for malicious downloads or scams. The ML classifier and PDF heuristics strongly indicate malicious intent, likely related to distributing malware or phishing for game-related credentials. No scripts were extracted, but the PDF structure and embedded links are indicative of a downloader or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.xyz/app/431946152/generator-robux-game-hack PDF link annotation
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/how-to-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/worst-roblox-avatars_GM431946152.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/how-to-get-java-minecraft-free_GM479516143.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/how-many-levels-does-coin-master-have_GM406889139.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/mcpe-master-coins-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/free-coin-spin-daily-link-net_GM406889139.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/robux-free-online_GM431946152.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/coin-master-hack-apk-iphone_GM406889139.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/coin-master-fan-page_GM406889139.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/coin-master-50-spin-link_GM406889139.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/free-robux-net_GM431946152.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/what-is-a-minecraft-client_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c71.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C71 26584 bytes
SHA-256: 4cf33c0a27b389f0f59640255e3ea275ffc126fba7fcb199db50b345703a5e77
font_01_sfnt_off00008975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8975 18184 bytes
SHA-256: b4ce75e5ef7529b15199eebab458c6aae3f76f2df33fea1dae4b183417bcc22e

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