Malicious PDF — malware analysis report

Static analysis result for SHA-256 8af2477ebd90eab1…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 12:43:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 941e2d63a4ffcb7cc5d8537814edb267 SHA-1: 275944987c4ff4f6954c78256c8880749a53b01f SHA-256: 8af2477ebd90eab1ad505f83d91a7a12683d61db30f2aafed93804142eee32c1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'free game hacks' and generators. The primary lure URL is http://netcdn.tw/app/479516143/minecraft-windows-10-free-game-hack. This pattern suggests a phishing or scam campaign designed to trick users into visiting potentially harmful sites. No scripts were extracted, limiting the analysis to the document's embedded links and lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFException. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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-windows-10-free-game-hack In PDF document text
    • http://stitqi.ac.id/website//repository/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/free-vpn-for-minecraft_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/coin-master-hack-tool-no-human-verification_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/cool-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/114-hacks_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/rewards-robux_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/coin-master-free-spin-whatsapp-group-link_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/coin-master-free-download-app_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/coin-master-free-shield-link_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-get-free-robux-grayphiny_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/coin-master-spin-hack-link_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/coin-master-apk-hacked-3526_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/coin-master-free-spins-and-coins-haktuts_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/coin-master-hack-org_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000309a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x309A 22472 bytes
SHA-256: 15978b137728935fbb3564865e478dc54ebd947293457c6c8647f908f52395eb
font_01_sfnt_off00006215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6215 18812 bytes
SHA-256: 64384bfcc58c1bbdf03ee3f883a0be16d7cce96ae7e77f1df9d799b764379cfd

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