Malicious PDF — malware analysis report

Static analysis result for SHA-256 49aef4053c1d268d…

MALICIOUS

PDF

34.5 KB Created: 2021-07-01 22:41:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: dbb78888a9b55606665c7a6885078f00 SHA-1: 7fd9b35eb7a1e5af79c48a00dd01b6ee24d39e93 SHA-256: 49aef4053c1d268d953b5cad63a78a8cd4511041dc31df11e6dac1c51cb2d0d5
260 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and free currency to trick users into clicking malicious links. The document body and heuristics indicate a redirection to potentially harmful websites, including known malicious redirectors and a large link farm designed for SEO manipulation. No scripts were extracted, but the presence of embedded URLs and the nature of the lures suggest an attempt to lead the user to a malicious download or phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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-adopt-and-raise-a-cute-kid-free-admin-game-hack In PDF document text
    • http://perpus.ar-rum.ac.id/repository/how-to-hack-srf-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/roblox-chat-hacks-script_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/free-robux-generator-for-roblx_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/https-webrobloxcom-robux-free_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/roblox-toys-code-free-dog_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/coin-master-free-spain_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/fairy-tail-online-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/how-to-use-winrar-for-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/coin-master-hack-version-download_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/script-roblox-pet-simulator-hack_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/free-robux-no-offers-no-survey_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/cmd-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/coins-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/free-roblox-accessories-2021_GM431946152.pdfIn macro / runtime command snippet
    • http://perpus.ar-rum.ac.id/repository/how-to-get-free-robux-ipad-2021_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//In macro / runtime command snippet
    • 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_off00002db9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DB9 22636 bytes
SHA-256: 4a3b021ef3532f59982a97de6d2a6a7bb671705836ddcbb7796c12e6f717aa8f
font_01_sfnt_off00006014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6014 19624 bytes
SHA-256: b4f268ca92d57f695df0fef74b7e349975aa03de190cf92698a07e6e4d451f12

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