Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f9bd4f9318831e0…

MALICIOUS

PDF

33.4 KB Created: 2021-06-20 10:38:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: cb3335138587ea00aa988045d57d38fa SHA-1: c488474d42ae0c76bb7e47ab156a856b9d3b1009 SHA-256: 6f9bd4f9318831e011889d1edeebb7d98c476e53ed36e4f017010786fc5ba36f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are hosted on `digilib.iailm.ac.id` and promote game hacks and currency generators for popular games like Roblox and Coin Master. The heuristic `PDF_SEO_LINK_FARM` indicates a large number of such links, suggesting a coordinated effort to drive traffic to potentially malicious or scam-related content. The presence of a "CLICK HERE TO ACCESS ROBUX GENERATOR" call-to-action further reinforces the lure-based attack pattern. While no scripts were explicitly extracted, the nature of the links and the ML classification suggest a high likelihood of malicious intent, possibly leading to malware downloads or phishing.

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.co/app/431946152/roblox-genuine-hack-game-hack PDF link annotation
    • http://digilib.iailm.ac.id/repository/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-spins-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/hack-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/getrobux-ninja_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/legit-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-strucid-hack-script_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-account-with-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-free-spins-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-bypass-human-verification-on-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/haktuts-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-hack-generaort-hack-accounts_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-spins-coin-master-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/tiktok-free-50-followers_GM835599320.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/instagram-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-daily_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/pokemon-go-free-zekrom-counters_GM1094591345.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/chisel-and-bits-mod-minecraft-pe_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_off00002d82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D82 21932 bytes
SHA-256: 331395636ba8140515f6ac0cc382ce9fc47a9080eb2cecbb39b14a27e03b3102
font_01_sfnt_off00005def.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DEF 18916 bytes
SHA-256: 3477c6e16f1b2734930678070e807a156ad5d8a9fec0d02caf36b7212e0eed14

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