Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f345caa610f0e49…

MALICIOUS

PDF

37.0 KB Created: 2021-05-22 04:35:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 64072feb6833805d9502149d6064c17d SHA-1: 041a14e41f1b23f27fdb34d6ed15626557f79895 SHA-256: 8f345caa610f0e49971f022fae86dd6bd8635cc78f5eb5d58ec5d0add4d03ff1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links that redirect to malicious infrastructure, specifically a link related to 'free Minecraft servers' and 'game hacks'. The document body also contains similar lures and a call-to-action phrase. The ML classifier also flagged this PDF as malicious, indicating a high probability of malicious intent.

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/479516143/free-minecraft-servers-to-join-game-hack In PDF document text
    • https://topkoreamart.com/public/upload/files/free-robux-come_GM431946152.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/roblox-hack-com_GM431946152.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/minecraft-bedrock-edition-download-pc-free_GM479516143.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/coin-master-freebies_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
stream_002_off000033b4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33B4 26048 bytes
SHA-256: 5e136e7f843d53b7412b9f56815aee9af9b69e7e96603270dbbcfe324680839b
font_01_sfnt_off00007072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7072 17992 bytes
SHA-256: f4dddb1eb99788babbc28e2933b16aea696a65c0930c8e69ff3f00d50dcb50ca

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