Malicious PDF — malware analysis report

Static analysis result for SHA-256 2653cf68ca487f78…

MALICIOUS

PDF

45.1 KB Created: 2021-06-03 05:47:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 022e8eb0782532ecaf83acd1b894ec2f SHA-1: 544783eaf5b9641c82540290a53894605553a6eb SHA-256: 2653cf68ca487f78e2087c3a0ea8dc5071eac838fd4db1d6b9637dfc7b0e0769
102 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are related to game hacks and cheats, suggesting a lure for users to download potentially malicious software. The ML classifier also strongly indicated maliciousness. The presence of a download button lure further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/479516143/minecraft-pe-hack-client-game-hack PDF link annotation
    • http://elib.acls-indonesia.com/repository/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-private-server-roblox_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/real-working-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-unlimited-spin-link_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/hack-coin-master-apk-32_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-hack-spin-160-pro_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/minecraft-112-hacked-client_GM479516143.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-hack-apk-july-29_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/minecraft-free-school_GM479516143.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/how-to-change-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/roblox-executor-free_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/pokemon-go-free-account-username-and-password_GM1094591345.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/how-do-you-get-free-robux-without-paying_GM431946152.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_004_off00005420.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5420 26340 bytes
SHA-256: 90408ad71d7eff87c3a848fa6afcd4fb95f7e7f875aefee8e4e4a0bc99915369
font_01_sfnt_off00008f09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F09 17968 bytes
SHA-256: a1bdeaf7b929e0321b1dbbf2b8f1cbdbbbd0c833166bb9e07af12e4b4538f125

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