Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ba469d87207789f…

MALICIOUS

PDF

49.7 KB Created: 2021-06-02 12:45:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 3b84581b35f35066c4ce27e42a7f5fd8 SHA-1: c5eef6c61ef63ce8d9255e9f8179e5230373dbd2 SHA-256: 0ba469d87207789f5f2642d7eff59eed54457e5e3f45c8b4c083854f502f0e41
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which appear to be SEO-spam related to popular games and free items. The ML classifier strongly indicated maliciousness, and the presence of a 'download button' heuristic suggests a lure for users to click these links. The primary purpose appears to be directing users to potentially malicious or scam-related websites.

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 https://netcdn.xyz/app/431946152/how-to-hack-emojis-in-roblox-game-hack PDF link annotation
    • https://cluster-consulting.com/images/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://cluster-consulting.com/images/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • https://cluster-consulting.com/images/free-tiktok-followers_GM835599320.pdfIn PDF document text
    • https://cluster-consulting.com/images/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • https://cluster-consulting.com/images/coin-master-free-spins-a2z-help_GM406889139.pdfIn PDF document text
    • https://cluster-consulting.com/images/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • https://cluster-consulting.com/images/how-to-get-minecraft-bedrock-edition-on-pc-for-free_GM479516143.pdfIn PDF document text
    • https://cluster-consulting.com/images/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • https://cluster-consulting.com/images/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • https://cluster-consulting.com/images/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • https://cluster-consulting.com/images/games-like-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://cluster-consulting.com/images/free-spins-and-coins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://cluster-consulting.com/images/give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://cluster-consulting.com/images/how-to-hack-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • https://cluster-consulting.com/images/roblox-e-free_GM431946152.pdfIn PDF document text
    • https://cluster-consulting.com/images/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://cluster-consulting.com/images/how-to-get-free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://cluster-consulting.com/images/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • https://cluster-consulting.com/images/coin-master-hacks-no-downloading_GM406889139.pdfIn PDF document text
    • https://cluster-consulting.com/images/coin-master-hack-2021-no-survey_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_off000050fa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50FA 29332 bytes
SHA-256: 9b4024d8033452af4efae72900cdb1dad2704e1e06fb5572252e3712b8f76522
font_01_sfnt_off000090e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90E1 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00009d89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D89 18916 bytes
SHA-256: 63c7739ae1826d402c186ab205ab53ea80c480b02b1cb42113dcc92813ec513a

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