Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a682cfbed361f9b…

MALICIOUS

PDF

35.7 KB Created: 2021-06-28 01:50:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: bdcf44737350aba5459932051c1376fa SHA-1: 44f9a7379d592af865c4d325081420305fea09ef SHA-256: 1a682cfbed361f9b4719921b50c02efc4f950bcc4d703610c5a186075e781522
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game currency and hacks to trick users into visiting malicious websites. It contains numerous links to redirectors and SEO link farms, including the primary malicious URL http://netcdn.co/app/431946152/roblox-robux-hack-no-app-download-game-hack. The document body and heuristics indicate a clear intent to drive traffic to potentially harmful content, likely as part of a phishing or malware distribution scheme.

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.co/app/431946152/roblox-robux-hack-no-app-download-game-hack In PDF document text
    • http://perpus.wdh.ac.id//repository/tiktok-free-download-for-android_GM835599320.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-group-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-no-human-verification-android-2021_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-robux-hack-script-jquery_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/infinite-jump-roblox-download-free_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-games-like-roblox-for-chromebook_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-change-your-roblox-username-for-free-no-email_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/whats-a-code-for-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-hack-roblox-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-free-pastebin-not-patched_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-hack-menu-jailbreak-2021-mayo_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/safest-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/pubg-uc-cheap_GM1330123889.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/how-to-get-a-refund-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/rewards-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000338e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x338E 22292 bytes
SHA-256: 10322dd41fac259fb8504928887c14e7bf5813b8eb7145bb57d4b5a6b4bae88e
font_01_sfnt_off0000650c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x650C 19476 bytes
SHA-256: 9168b9d2831d783f10b18d5d7b787f716295716f202c8c845113177d995b2648

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