Malicious PDF — malware analysis report

Static analysis result for SHA-256 d161242896f51ea4…

MALICIOUS

PDF

35.6 KB Created: 2021-07-06 13:19:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d70c898ef27f5c5f6725762046d302e2 SHA-1: dc92a6fded7024ec209df8c08f0942b12d8ed9e7 SHA-256: d161242896f51ea4d2e3882871f8ee5257f99e0619a46246c9de01acb08b614e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure, specifically advertising 'free game hacks' and 'free robux'. One critical heuristic identified a link to known malicious redirector infrastructure, suggesting a phishing or scam attempt. The document body, though partially corrupted, contains similar lure text and URLs, reinforcing the malicious intent. No scripts were extracted, but the primary attack vector appears to be social engineering via deceptive links.

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/479516143/minecraft-java-code-free-game-hack In PDF document text
    • http://lib.untad.ac.id/repository/roblox-free-robux-no-phone-number_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/worst-roblox-avatars_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/cheats-on-skyscraper-tyocoon-2-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/code-code-robux-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/tiktok-free-followers_GM835599320.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-hack-a-roblox-user-account-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/exploit-roblox-hack-2021-octubre_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/robux-hack-not-patch_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-german-flag-t-shirt-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-spin-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-btools-script-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-daily-free-coins-link_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-coin-spin_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-mod-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-hack-tool-v1-9-apk_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/best-minecraft-hacks_GM479516143.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_off00003691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3691 22508 bytes
SHA-256: b5bbc9dc3585bc05a91d3730ddab666976bb8ee7feaee11de3673f2c31cc9c46
font_01_sfnt_off0000683f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x683F 18452 bytes
SHA-256: 16671fd22d5178f4ee91bd1dac9de86b871bb3f71416cabb6af28097c9991cf7

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