Malicious PDF — malware analysis report

Static analysis result for SHA-256 da411ea3bc799de1…

MALICIOUS

PDF

43.5 KB Created: 2021-05-12 12:11:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: eb3c1edcac23efe436f7fa41f9d16d48 SHA-1: 5110c3ca7eae9da13f258ea6978a36fb03d7c5fb SHA-256: da411ea3bc799de10d70ec5c5dfc06ef63646b018591df0333332c0b6a065dca
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to appear as 'game hacks' or 'generators', redirecting to malicious infrastructure. The primary lure URL is https://netcdn.xyz/app/431946152/robux-offer-wall-game-hack, which is associated with a known malicious redirector. The document body and embedded links suggest a phishing attempt to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/robux-offer-wall-game-hack In PDF document text
    • http://gaec.cl/images/how-to-hack-coin-master-game-without-root_GM406889139.pdfIn PDF document text
    • http://gaec.cl/images/hack-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://gaec.cl/images/teach-me-to-hack_GM431946152.pdfIn PDF document text
    • http://gaec.cl/images/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://gaec.cl/images/i-didnt-get-my-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://gaec.cl/images/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://gaec.cl/images/need-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://gaec.cl/images/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://gaec.cl/images/gamesofficenet-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://gaec.cl/images/coin-master-2021_GM406889139.pdfIn PDF document text
    • http://gaec.cl/images/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://gaec.cl/images/how-to-get-free-spins-on-coin-master-android_GM406889139.pdfIn PDF document text
    • http://gaec.cl/images/coin-master-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://gaec.cl/images/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • http://gaec.cl/images/how-do-you-hack-for-2021000-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • http://gaec.cl/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://gaec.cl/images/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://gaec.cl/images/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://gaec.cl/images/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://gaec.cl/images/woman-roblox_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_off00004b90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B90 25676 bytes
SHA-256: 22f22fd5219b20a5a757c80f5e91f995bac30c0e9a36aa9423567a1f19b4d12b
font_01_sfnt_off00008733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8733 18348 bytes
SHA-256: fa82912c9e36e73f744cfc3a856a8c89ccc54bfc28e0c80a649179b290e2af39

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