Malicious PDF — malware analysis report

Static analysis result for SHA-256 88aa00146153945e…

MALICIOUS

PDF

36.0 KB Created: 2021-05-21 14:31:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 6ac96137af2cb2dd1c358e902bf8182a SHA-1: 69cccd23418a8ccae1a3f55093520f7308f38f7a SHA-256: 88aa00146153945e043fde5f141f481fd647c4260ac0337cc236027038e1c32f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including one identified as a malicious redirector. The document body and heuristics indicate a lure for 'free generator / game hack' content, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect the user to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9508

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/835599320/how-to-get-coins-on-tiktok-for-free-game-hack In PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/coin-master-free-spins-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/pokemon-go-free-fire_GM1094591345.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 3

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
stream_002_off00003214.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3214 26752 bytes
SHA-256: e7bf70c0b1ac3fbc8e9322ebfae12b2340ea6a010ee8a1c87da3dbb554616d52
font_01_sfnt_off00006d3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3D 17620 bytes
SHA-256: 8692d5e818e35dd748692bcd8ce3b5e7bd8db96413eb0bedc2b598b0f37696f0

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