Malicious PDF — malware analysis report

Static analysis result for SHA-256 8649d12aa2495629…

MALICIOUS

PDF

29.2 KB Created: 2021-05-10 18:19:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9ecb04b1c6f2dd8918295cc56d0eadbd SHA-1: c4137c53e7a5cb8af5158245eefd915e2c784426 SHA-256: 8649d12aa2495629fd08971a4eac426d4f3339029d8cfb840ad43ded710ef6e6
142 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9774

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/how-do-you-get-roblox-money-game-hack PDF link annotation
    • http://slims.abulyatama.ac.id//repository/coin-master-free-400-spin-link_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/free-gold-cards-coin-master_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/free-spins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-free-spins-and-coins-group_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/hackear-coin-master-android_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/como-hackear-coin-master-gratis_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/hack-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/free-minecraft-bedrock-server_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-hack-spin-160-pro_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-hack-no-survey_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/wurst-hacks_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/how-many-levels-does-coin-master-have_GM406889139.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_off000021f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21F9 20340 bytes
SHA-256: 7ceab2e3b11bbb5949e077cd9ca6c1541f04ae18d45034900d3436e4f4533220
font_01_sfnt_off00004d6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D6B 18896 bytes
SHA-256: 29cfb48d0033888f81e151c2829fb396172311d25236ba798d4831208641a69e

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