Malicious PDF — malware analysis report

Static analysis result for SHA-256 23bc4e080dd661d0…

MALICIOUS

PDF

36.7 KB Created: 2021-05-21 20:00:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ac304fecd280593708a5a8c04300f0f1 SHA-1: bb71c7a0768821ecfc4d7f8a79e71be49f2ac177 SHA-256: 23bc4e080dd661d0ff7913c060f5b2d67463b99482b8e913e562585b046dd594
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically disguised as 'free generator' or 'game hack' lures. The document body and embedded links reinforce this theme, aiming to trick users into visiting these malicious sites. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest a malicious redirector chain designed to deliver further payloads or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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 https://netcdn.xyz/app/431946152/cute-free-hair-on-roblox-game-hack In PDF document text
    • http://onlinemusicsolutions.com.au/images/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://onlinemusicsolutions.com.au/images/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://onlinemusicsolutions.com.au/images/latest-free-spin-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://onlinemusicsolutions.com.au/images/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • http://onlinemusicsolutions.com.au/images/coin-master-hack-mod-apk-2021-download_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_off0000360e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x360E 24376 bytes
SHA-256: 4c1ef710aceea75471c987844af434acccfe93052d3ec67de23a4872bddfb289
font_01_sfnt_off00006d7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D7E 18540 bytes
SHA-256: 488c37b81cb6318595a8d643f53454b31d34364b68f61b3c1daecc568804ddf5

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