Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfa7d2180ec7608c…

MALICIOUS

PDF

33.8 KB Created: 2021-07-05 10:01:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 1778feca02e3c9da69062610ec632778 SHA-1: 7b2e52bb1c79327b3a8ea50c16e2f886bb4a99a5 SHA-256: dfa7d2180ec7608c24c0f09982d98580175b0e3fa60cbf82495bbeebec1b4f78
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users to external websites, including a known malicious redirector at http://netcdn.tw/app/431946152/free-roblox-accounts-with-robux-game-hack. The document body and heuristics indicate a scam related to free game items and hacks, likely intended to lead users to further malicious content or phishing pages. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/431946152/free-roblox-accounts-with-robux-game-hack In PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/download-hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/roblox-redeem-card-codes-free_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/do-robux-generators-work_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/roblox-adopt-me-free-money-glitch_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/minecraft-for-free-games_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/roblox-the-legendary-swords-rpg-hack-script_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/pokemon-go-free-team-change_GM1094591345.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/free-coin-master-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/coin-master-ios-gods-hack_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/download-hacked-games-com-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/cheat-codes-for-on-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/hackear-net-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/has-my-computer-been-hacked-playing-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/how-to-inject-a-hack-into-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
font_00_sfnt_off0000305d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x305D 21152 bytes
SHA-256: c2bed2342002d25b081d895c2c5393e916d7fb2f6f89a5312e9efa4918d3ec13
font_01_sfnt_off00005e2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E2E 19376 bytes
SHA-256: f0162913020963e5353758c8abfc28ea25b7e1d49227c6af753a68a32515d33f

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