Malicious PDF — malware analysis report

Static analysis result for SHA-256 01badc0194e81813…

MALICIOUS

PDF

46.0 KB Created: 2021-05-17 19:08:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 0d1aad86bb1c6c960e8457f5f8446bf5 SHA-1: 8dd04f66256b7d2e9c6a42f66e171b3874d15702 SHA-256: 01badc0194e818136391b619feb1daa6ce217a325f204bb2a23d3a1749d1fb15
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains multiple links to known malicious redirectors, specifically promoting 'Coin Master Hack' and similar game-related lures. The document body, though heavily obfuscated, contains references to these lures and the wkhtmltopdf authoring application. The primary attack pattern involves tricking the user into visiting a malicious URL which likely leads to a download or further compromise. No scripts were extracted, but the embedded URLs and heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

Heuristics 4

  • 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.
  • 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 https://netcdn.xyz/app/406889139/coin-master-hack-pro-gamers-game-hack In PDF document text
    • http://sscclc.edu.ec/images/coin-master-free-spins-link-2021-blogger_GM406889139.pdfIn PDF document text
    • http://sscclc.edu.ec/images/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • http://sscclc.edu.ec/images/coin-master-free-spins-2021-ios_GM406889139.pdfIn PDF document text
    • http://sscclc.edu.ec/images/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://sscclc.edu.ec/images/roblox-promo-codes-2021-robux_GM431946152.pdfIn PDF document text
    • http://sscclc.edu.ec/images/roblox-avatar-maker-free_GM431946152.pdfIn PDF document text
    • http://sscclc.edu.ec/images/free-realistic-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://sscclc.edu.ec/images/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://sscclc.edu.ec/images/httpswwwurcouponsdealcom202103coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • http://sscclc.edu.ec/images/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • http://sscclc.edu.ec/images/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://sscclc.edu.ec/images/roblox-comcom_GM431946152.pdfIn PDF document text
    • http://sscclc.edu.ec/images/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://sscclc.edu.ec/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://sscclc.edu.ec/images/minecraft-cracked-client_GM479516143.pdfIn PDF document text
    • http://sscclc.edu.ec/images/coin-master-free-spins-and-coins-for-today_GM406889139.pdfIn PDF document text
    • http://sscclc.edu.ec/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://sscclc.edu.ec/images/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://sscclc.edu.ec/images/113-hacked-client_GM479516143.pdfIn PDF document text
    • http://sscclc.edu.ec/images/coin-master-free-spins-link-2021-today_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_off00004cb5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CB5 25652 bytes
SHA-256: a297ca35811d1f6521f4a30dd560712eb2e90d6d92609a539ea28954dbc1e1fb
font_01_sfnt_off000086fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86FB 3204 bytes
SHA-256: 34e186eaedd0abe30d9918006f165105e5268ee5cd317aca3337fe6c60666134
font_02_sfnt_off000091fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91FE 18132 bytes
SHA-256: 7c3ba000fcc9e82367a9cf09e7428e48624a936725f215f3086fe1b405a0b7f2

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