Malicious PDF — malware analysis report

Static analysis result for SHA-256 79b29cf2a3a8961d…

MALICIOUS

PDF

46.9 KB Created: 2021-06-04 02:16:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 41f92ee35447383843b6fb55a70037cc SHA-1: 9876dba2d2b84b38eb40e0257e9b35a84e2cc31a SHA-256: 79b29cf2a3a8961d4f8dcae91219a0ab10e649d67fdcbdc37efd1a546d9c31b4
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The document body, though heavily obfuscated, contains references to game hacking and free currency, suggesting a lure for potentially malicious content or SEO spam. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.online/app/406889139/como-hackear-coin-master-iphone-game-hack PDF link annotation
    • http://perpus.poltekeskupang.ac.id/repository/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/hack-the-coin-master-game_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/robux-free-online_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/can-i-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/minecraft-free-download-ipad_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-coins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-hack-apk-35-18_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/free-spin-coin_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/rbx-earn_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/today-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/twitter-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/can-i-get-free-pubg-uc_GM1330123889.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/rbx-claim_GM431946152.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_off000051a6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51A6 25296 bytes
SHA-256: 53c93097c6143670e14098323c4667ccafe494bfc3c244eb465b42ba5bd11bef
font_01_sfnt_off00008b0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B0A 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off000094bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94BC 18316 bytes
SHA-256: 06561d1fe781349ebc89ed81d119ef5c9c3ee7c50d91a6ac0924a9774f8ddcd9

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