Malicious PDF — malware analysis report

Static analysis result for SHA-256 e168895daa8ebd6c…

MALICIOUS

PDF

34.9 KB Created: 2021-06-19 14:34:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c4959ea950a159b89bff1d408f091958 SHA-1: 9549c3662c3828d90cbf86adeed48dbb6586690a SHA-256: e168895daa8ebd6c7f370c71bef6d29a1e82c372c8837757fabde6aed255e181
82 Risk Score

Malware Insights

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

The document impersonates Facebook to lure users with the promise of free game items, directing them to a malicious URL. The ML classifier strongly indicated maliciousness, 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 PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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: http://netcdn.co/app/431946152/free-promo-codes-for-roblox-items-2021-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 http://netcdn.co/app/431946152/free-promo-codes-for-roblox-items-2021-game-hack PDF link annotation
    • http://digilib.akperkabpurworejo.ac.id/repository/free-robux-gift-cards-2021_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/pokemon-go-free-incense_GM1094591345.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • https://digilib.akperkabpurworejo.ac.id/repository/roblox-hack-programm_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/how-to-make-a-group-for-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/coin-master-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/pokemon-go-free-roam-hack_GM1094591345.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/free-fire-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/robux-hack-2021-download_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/instantrobux_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/coin-master-blogspot_GM406889139.pdfIn PDF document text
    • https://digilib.akperkabpurworejo.ac.id/repository/free-robux-without-human-verification-and-password_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/strucid-aimbot_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/roblox-cheat-second-till-death_GM431946152.pdfIn PDF document text
    • https://digilib.akperkabpurworejo.ac.id/repository/roblox-dragon-fury-hack_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/free-executors-for-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/minecraft-server-hacks_GM479516143.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_off00002f3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F3A 22396 bytes
SHA-256: 0325f4b9a67fc0678d11c300da5b1c20d5e5de51fab4bb4683c4c72e9229a34a
font_01_sfnt_off00006143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6143 19744 bytes
SHA-256: 472d2f29a4ccfabc451ccdaddb0b9819479f2b947035c4e8b04bb140f0cd43ab

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