Malicious PDF — malware analysis report

Static analysis result for SHA-256 42cd6846d1397d8c…

MALICIOUS

PDF

47.4 KB Created: 2021-05-12 11:54:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e43c3c7f15b03219f428f03991190dd3 SHA-1: b3e8515c97e480a92dc584f18b6664a90228588b SHA-256: 42cd6846d1397d8ce532cf81da33fe8d381a2ef698ce9d81ade426aff6383690
142 Risk Score

Malware Insights

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

The PDF document contains numerous links, identified as a link farm, that redirect to websites promising game hacks and generators. The primary lure appears to be related to Roblox and Minecraft, suggesting a scam or phishing attempt to trick users into visiting potentially malicious sites. No scripts were extracted, but the extensive use of external links points to a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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.
  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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/roblox-free-login-game-hack PDF link annotation
    • http://digilib.iailm.ac.id/repository/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/best-free-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/twitter-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-free-coins-and-spins-daily-summary_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-roblox-toys_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-firebird-card-free_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/minecraft-free-download-android-apk_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-get-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-village-cost_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-spins-on-coin-master_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_003_off000049ab.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49AB 27632 bytes
SHA-256: 273e4b4cfccfb2bf2cf5ce49c693cbdb594e4e03fe25770385a01b7362d1db07
font_01_sfnt_off000089bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89BC 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off000096ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96CE 18356 bytes
SHA-256: a8d26950e0e2eef33b27b6c10906646661cb910c2bf8a097fd7ed42515788ae2

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