Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d7c063fa3fea16c…

MALICIOUS

PDF

46.7 KB Created: 2021-06-03 22:27:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 543f156ba6839ff8bc873add15b7a221 SHA-1: d7f42f466d876a2524574d0c538c2192ea4de0f9 SHA-256: 1d7c063fa3fea16cfb13833cfffded1652b8d6c8922f2dfe031033169322d2d3
130 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. It uses a ClickFix paste-and-run lure and an invoice-themed lure. The file 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 0.9832

Heuristics 6

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/479516143/minecraft-windows-10-mod-menu-game-hack PDF link annotation
    • http://perpus.stikesphi.ac.id/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/is-tiktok-free_GM835599320.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/coin-master-hack-programers_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/coin-master-apk-mod-free-download_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-spins-generated-from-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/how-to-get-free-gold-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/coin-master-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/minecraft-ps3-free-download_GM479516143.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/coin-master-free-gold-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/where-to-get-free-stuff-in-roblox_GM431946152.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
stream_004_off00005668.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5668 26520 bytes
SHA-256: b2a586dea83a89897575daa9b36c49341f9eab3e56980a40e025da434c2afd50
font_01_sfnt_off000092ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92EE 18664 bytes
SHA-256: d514bf315b41fa54fe0c50a97b4da26b79196549822ea3c6d635b98116ec41ec

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