Malicious PDF — malware analysis report

Static analysis result for SHA-256 0087d3de359e8453…

MALICIOUS

PDF

50.5 KB Created: 2021-06-02 16:43:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d7830309cb9ba46a4cab9a0b2b4819b9 SHA-1: b0ce58e465de6f34a197ba4f48f161b8d8ddd190 SHA-256: 0087d3de359e8453c89fa578e7a7e9cf9d405573cdb209dfbe5ee5590ca867ce
82 Risk Score

Malware Insights

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

The document impersonates PayPal to lure users with a promise of free Roblox items, directing them to a malicious URL. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs and a call-to-action button further supports a phishing or malware distribution attempt. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9779

Heuristics 4

  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/let-me-play-roblox-for-free-game-hack.
  • 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/let-me-play-roblox-for-free-game-hack PDF link annotation
    • https://priveecard.com/wp-content/uploads/fsqm-files/roblox-free-ssscripts_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/roblox-hack-bugmenot_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/free-robux-points_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/heroes-online-is-free-roblox_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/free-robux-no-download-2021_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/free-tiktok-followers-without-verification_GM835599320.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/how-to-hack-survoivr-in-roblox-pc_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/redeem-code-hack-roblox_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/real-way-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/coin-master-free-spin-and-coins-links-2021_GM406889139.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_off000052ef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52EF 28220 bytes
SHA-256: 95b1616a04b0c1676875172f1867794472df56ec722a7595c8baf03c6fbd6bb4
font_01_sfnt_off0000942d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x942D 3932 bytes
SHA-256: 1c6fe31f0421c2fcffc56ee7eaef4c61f4813d9eda09106cd54bd4dfaf28987e
font_02_sfnt_off0000a119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA119 18812 bytes
SHA-256: 95cb0042b79c29b10607625be53ce91c53fdbf671a658f35841e746c8e989ea4

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