Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2899f7ba030f993…

MALICIOUS

PDF

37.1 KB Created: 2021-05-23 07:06:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 91da9b2eec02239e01786b4aac945f87 SHA-1: 5ed0487141e4a9afabe6159aa231b349aad01fab SHA-256: e2899f7ba030f993b7148ebf83270a40940b962202756df6b0d4f5d72790e8b6
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as a 'game hack' or 'free generator' for Coin Master. The presence of PDF_MALICIOUS_REDIRECTOR_LINK and PDF_GAME_HACK_REDIRECT_LURE heuristics strongly indicates a phishing or scam attempt. The embedded URLs are designed to lure users into clicking them, likely leading to further compromise or unwanted content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not 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 https://netcdn.xyz/app/406889139/coin-master-free-coins-and-spins-game-hack In PDF document text
    • http://ilifemarket.ru/images/freespinandcoinblogspotcom-2021-11-coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • http://ilifemarket.ru/images/real-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://ilifemarket.ru/images/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ilifemarket.ru/images/coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://ilifemarket.ru/images/how-to-get-free-robux-without-human-verification-2021_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
stream_002_off000035c8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35C8 25636 bytes
SHA-256: 88e2b42454b99a32ef1120ae8cd953580f7c3f0b410797062a1367e3afc68321
font_01_sfnt_off0000705d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x705D 18060 bytes
SHA-256: f77ee24e01944806ea28e16fd73427a54f7109e241804df06ce657d8c6d11cfb