Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec94ea206d46bf12…

MALICIOUS

PDF

34.0 KB Created: 2021-07-04 22:03:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 3720175da3f263ed035356c923e4a0b4 SHA-1: 42b4eb8c3ca6eb9238262adf5f01320826fb7eea SHA-256: ec94ea206d46bf12c5e1052d3009346506e4b9da25b83adeeaa58b55fa6eb32c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites that promise free in-game currency or hacks, such as Robux or Coin Master spins. One of the primary links, http://netcdn.tw/app/431946152/how-to-get-free-robux-game-hack, is flagged as a malicious redirector. The document body and heuristics indicate a lure for game-related cheats, likely leading to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/how-to-get-free-robux-game-hack In PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/da-hood-hack-roblox_GM431946152.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/free-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/roblox-hack-chaos-wacher_GM431946152.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/free-game-pack-coin-master_GM406889139.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/spin-coin-master_GM406889139.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/make-free-robux_GM431946152.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/coin-master-free-gift-link-2021_GM406889139.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/roblox-free-gamepass-script-2021_GM431946152.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/tuto-hacker-sur-prison-life-roblox_GM431946152.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/buxblast-com-robux_GM431946152.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/coin-master-free-spins-23-march-2021_GM406889139.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_off00003036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3036 21724 bytes
SHA-256: 31a4ff938353634a141bbc55c6d29de1b4becdbf1dc8a4c97346056a51a40cbe
font_01_sfnt_off00006007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6007 18984 bytes
SHA-256: b02f235e187ca63825268846ce24859b9c73d6f06522f0e44481555b58ecada8

Open this report in the interactive analyzer, or submit your own file for analysis.