Malicious PDF — malware analysis report

Static analysis result for SHA-256 00c414f5053307da…

MALICIOUS

PDF

47.9 KB Created: 2021-06-13 16:11:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 19f86b302bd6162ef984de837658af81 SHA-1: ca9ccac836cfd32dbe0a84b0c4b61b2472280492 SHA-256: 00c414f5053307daf8cef0e6010dd6b857c4bd3fd3e2bd7615aab3aa1a6459d0
102 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which are SEO-optimized and point to potentially malicious content related to game hacks and free currency. The presence of a "download button" heuristic further suggests a lure to download further payloads. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 http://netcdn.co/app/431946152/how-to-hack-roblox-without-verification-game-hack PDF link annotation
    • http://repository.ummy.ac.id//repository/get-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-get-free-spins_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/hack-de-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/free-robux-for-life_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/robux-generator-that-works_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/free-roblox-backdoor-to-earn-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/black-panther-mask-roblox-free_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/master-free-spin_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-roblox-codes-2021_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/roblox-scripts-hack-dungeon-quest_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/hack-robux-ohne-cheat-engine_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/roblox-exploit-download_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/earn-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/free-robux-no-virus_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/free-roblox-robux-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051c5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51C5 25072 bytes
SHA-256: fc1a0001ef630c5a42be17ccf6b8ac94eef2d4c6de0e24df2e8537cf74b8345b
font_01_sfnt_off00008bbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BBC 2912 bytes
SHA-256: 02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f
font_02_sfnt_off000095b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95B8 19208 bytes
SHA-256: ddb57aae6428babc066d43fac83e859bb5254469a8ac894265c283474d0dfc80

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