Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad0ae81c700b715b…

MALICIOUS

PDF

42.9 KB Created: 2021-05-19 03:31:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 6340e8c929423e8de1fa80fb7e7776c3 SHA-1: 3c62724e051815b70ae91d9dfd651142d6cd6528 SHA-256: ad0ae81c700b715b77afd1c3317a15aea80a78a935b0340384397e504625da0b
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains links to malicious redirector infrastructure, specifically promoting 'free generator' or 'game hack' lures. The presence of a visual download button and instructions for a password-protected archive suggest a workflow designed to trick users into downloading a payload. While no scripts were explicitly extracted, the nature of the lures and embedded URLs strongly indicates a malicious intent to deliver a second-stage exploit or malware.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/bux-free-robux-game-hack In PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-hack-coin-master-game-without-verification_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/how-to-block-someone-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/hack-para-coin-master-sin-verification_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/hack-coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-can-i-get-free-coinsn-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/hack-download_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-roblox-app_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-lawsuit_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/minecraft-hacks-115-2_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
stream_003_off000047d2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47D2 27492 bytes
SHA-256: 5462b3f911151eee61ba6672731aace7d716c0f1a37258739cdc96ac2e243cf1
font_01_sfnt_off0000865b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x865B 18012 bytes
SHA-256: 48dadac1a540eb24f39d188e0eb07df2fd2c4cea4184d8a92cbd726ce4786484

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