Malicious PDF — malware analysis report

Static analysis result for SHA-256 26e2f3e04d972ea8…

MALICIOUS

PDF

42.8 KB Created: 2021-05-13 09:33:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d49c132a46dd12ca08b606458f31a8bb SHA-1: 4aee62c1a701fb7858f86fa379ab1deea05bc5fa SHA-256: 26e2f3e04d972ea87d286c7f2f64ba58ff2b06e9feb0368cec906b1ef8476782
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to websites that appear to be part of a link farm, with many redirecting to a 'free generator' or 'game hack' lure. The primary URL, https://netcdn.xyz/app/431946152/free-robux-no-apps-game-hack, is flagged as a malicious redirector. This suggests the document's purpose is to drive traffic to potentially malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/431946152/free-robux-no-apps-game-hack In PDF document text
    • http://dana1157.com/images/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://dana1157.com/images/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://dana1157.com/images/coin-master-hack-android_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/minecraft-free-online_GM479516143.pdfIn PDF document text
    • http://dana1157.com/images/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/how-do-you-get-roebucks-for-free_GM431946152.pdfIn PDF document text
    • http://dana1157.com/images/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://dana1157.com/images/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://dana1157.com/images/coin-master-game-hack_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/free-spin-coin-master-online_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • http://dana1157.com/images/free-spins-coin-master-march-2021_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/cheating-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://dana1157.com/images/coin-master-free-spin-daily-bonus_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/i-robux_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_off000047dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47DC 27512 bytes
SHA-256: badcf2a6f5d3eaeccdea9b75ed60493362a38423722ebd59bf3d268d37c9bb21
font_01_sfnt_off0000853d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x853D 18192 bytes
SHA-256: dd781f2eaffddff6619a7729b763fabd5b8c4a088eef07f4c149f41bf202d502

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