Malicious PDF — malware analysis report

Static analysis result for SHA-256 085e513ce19c9b36…

MALICIOUS

PDF

34.1 KB Created: 2021-07-08 11:36:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9fa4d2b144d2b7bc9938fb46d1915298 SHA-1: d6e529df286ca9cca0539062ad43ee22aa595cc9 SHA-256: 085e513ce19c9b36bb19666bc62f5a11a89a1f5af7763043d3a1f14ca5a12abc
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed to lure users into clicking links by promising game hacks and free spins. It contains numerous links to external PDFs and a primary redirector URL, indicating a phishing or scam attempt. The ML classifier also strongly flagged this document as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.tw/app/406889139/coin-master-free-spins-link-2021-today-game-hack In PDF document text
    • https://elearning.mismiftahulumam.sch.id/__statics/gudangsoal/files/code-for-naruto-roblox-free-spins_GM431946152.pdfIn PDF document text
    • https://elearning.mismiftahulumam.sch.id/__statics/gudangsoal/files/how-to-make-a-shirt-hack-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mismiftahulumam.sch.id/__statics/gudangsoal/files/free-robux-no-password-or-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mismiftahulumam.sch.id/__statics/gudangsoal/files/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mismiftahulumam.sch.id/__statics/gudangsoal/files/seashit-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mismiftahulumam.sch.id/__statics/gudangsoal/files/robux-gift-card-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.mismiftahulumam.sch.id/__statics/gudangsoal/files/como-descargar-hacks-para-roblox-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mismiftahulumam.sch.id/__statics/gudangsoal/files/free-gift-cards-for-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mismiftahulumam.sch.id/__statics/gudangsoal/files/coin-master-shield-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mismiftahulumam.sch.id/__statics/gudangsoal/files/roblox-password-hacker-online_GM431946152.pdfIn PDF document text
    • https://elearning.mismiftahulumam.sch.id/__statics/gudangsoal/files/roblox-20-download-free_GM431946152.pdfIn PDF document text
    • https://elearning.mismiftahulumam.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-urban-network_GM431946152.pdfIn PDF document text
    • https://elearning.mismiftahulumam.sch.id/__statics/gudangsoal/files/roblox-lumber-tycoon-2-hack-glitch_GM431946152.pdfIn PDF document text
    • https://elearning.mismiftahulumam.sch.id/__statics/gudangsoal/files/free-robux-discord_GM431946152.pdfIn PDF document text
    • https://elearning.mismiftahulumam.sch.id/__statics/gudangsoal/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://elearning.mismiftahulumam.sch.id/__statics/gudangsoal/files/coin-master-hack-software-download_GM406889139.pdfIn PDF document text
    • https://elearning.mismiftahulumam.sch.id/__statics/gudangsoal/files/roblox-kostenlos-robux-hacken_GM431946152.pdfIn PDF document text
    • https://elearning.mismiftahulumam.sch.id/__statics/gudangsoal/files/high-vis-roblox-free_GM431946152.pdfIn PDF document text
    • https://elearning.mismiftahulumam.sch.id/__statics/gudangsoal/files/someone-hacked-my-roblox-account_GM431946152.pdfIn PDF document text
    • https://elearning.mismiftahulumam.sch.id/__statics/gudangsoal/files/how-can-you-get-robux-in-roblox-for-free_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_001_off00002c73.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2C73 23012 bytes
SHA-256: a40d2a795b3d32b859be88d0846cbadda64e6124fb2cd83d99a1e6f7b8ff6363
font_01_sfnt_off0000603d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x603D 19100 bytes
SHA-256: de35a114d8e8c4fc4d70d52a756b20ceb128d757b6ef9e01fa5e276a673837de

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