Malicious PDF — malware analysis report

Static analysis result for SHA-256 02b03a083c3d5d37…

MALICIOUS

PDF

44.9 KB Created: 2021-05-17 12:19:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ea4e6008d9364d2afb48a277f9e7492b SHA-1: d89eff365287b1844178c60d162bdd1ca1991e0b SHA-256: 02b03a083c3d5d370b0fca3181103bb13b55b70b931b68a4f93b26be35294f7a
142 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with malicious links. It also hosts a large number of external links, many of which appear to be SEO-optimized for scam-related content like game hacks and free in-game currency. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/406889139/coin-master-free-coins-and-spins-hack-game-hack PDF link annotation
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/how-to-get-free-clothes-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/best-free-spins-link-coin-master_GM406889139.pdfIn PDF document text
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/easy-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/coin-master-free-account_GM406889139.pdfIn PDF document text
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/coin-master-apk-mod-free-download_GM406889139.pdfIn PDF document text
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/hack-download_GM431946152.pdfIn PDF document text
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/roblox-sued_GM431946152.pdfIn PDF document text
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/free-spins-coin-master-links-2021_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_003_off00004bd8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BD8 24260 bytes
SHA-256: 1d5adc94a3b9bd2e8c0d16a1843b312616d3c5371dda1699514184dda9d76f3b
font_01_sfnt_off0000836a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x836A 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00008d50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D50 18228 bytes
SHA-256: 354d04eea8306255969a9ffde93a2dc9fe516d06f825e89064d5817ccb1fcce8

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