Malicious PDF — malware analysis report

Static analysis result for SHA-256 c94b412653a63028…

MALICIOUS

PDF

36.3 KB Created: 2021-07-03 14:24:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 519a1c1da67b7852e4506689bf4adab8 SHA-1: 665fc46c104d723dbed461a66d7c94d373b46307 SHA-256: c94b412653a630288899db23c46e7e2781b28471cf55f59bcaf4cccaafa84004
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are hosted on a domain associated with SEO spam and link farms. The document body and extracted URLs suggest a lure for free in-game currency or items, a common tactic for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.tw/app/431946152/how-to-get-free-robux-on-mobile-game-hack PDF link annotation
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/how-to-roblox-script-hack_GM431946152.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-ios-jailbreak_GM406889139.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/minecraft-bedrock-edition-download-pc-free_GM479516143.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/robux-free-com_GM431946152.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/roblox-goku-t-shirt-free_GM431946152.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/new-roblox-exploit-hack_GM431946152.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/best-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/coin-master-free-spin-ml_GM406889139.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
font_00_sfnt_off0000333a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x333A 23296 bytes
SHA-256: 0b6c4153b6dbc104694f1724bb4c952ddd71c3940e2363307ed3a19eb0e06628
font_01_sfnt_off000067fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67FA 19372 bytes
SHA-256: 5331e3b47e1eecd1b1cb57ee2f3545b8b8fbb1b10f6e158321778d87dfa25569

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