Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d867665f4b3b38c…

MALICIOUS

PDF

44.6 KB Created: 2021-05-10 21:20:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 391eea3b78ab8e0a9fa1afb68607743d SHA-1: bd97be0f398c6db97b722a77b6a872fc92583a80 SHA-256: 9d867665f4b3b38c6d12108f7ae6104689beecc402454a5bb77199b1367c2f27
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs that point to link farms and game hack generators, indicating a lure for users seeking cheats or in-game currency. The heuristic firings confirm the presence of a link farm and a redirector, suggesting the document's primary purpose is to drive traffic to these external sites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/406889139/get-free-spins-on-coin-master-links-game-hack PDF link annotation
    • http://unionmusicaldebenidorm.com/images/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/coin-master-hack-without-verification-code-2021_GM406889139.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/coin-master-free-spins-and-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/collect-free-spin-linms-coin-master_GM406889139.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/coin-master-free-spins-moonactive_GM406889139.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/minecraft-18-9-hacked-client_GM479516143.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/coin-master_GM406889139.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/coin-master-spin-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/minecraft-free-download-ipad_GM479516143.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/coin-master-hack-online-no-human-verification_GM406889139.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.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_003_off00004a5a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A5A 29392 bytes
SHA-256: 3008f4fb605690d5c44fec570b8bcf227c1c3079168f16fdcedd0974426b098c
font_01_sfnt_off00008ccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CCD 18056 bytes
SHA-256: 4b724ee49242e9c8465e3a985e2896a04a7babff1c2e883c4eb2adcfe8b67358

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