Malicious PDF — malware analysis report

Static analysis result for SHA-256 54b16d1354df1890…

MALICIOUS

PDF

42.0 KB Created: 2021-05-12 09:43:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 91213c1a2ce361ceda2e908c0ca009cb SHA-1: 543c82804543fab99db04f0175aec92da351525f SHA-256: 54b16d1354df18903a775463b0b13510e2291c5617c10b3829167a7ae8624c9d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, identified as a link farm, pointing to external websites. The document body, though heavily obfuscated, suggests a lure related to 'hack coin master' and 'free spins', indicating a potential scam or phishing attempt. The presence of multiple external URIs and the ML classifier's high confidence score support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • 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.
  • 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/hack-coin-master-for-iphone-game-hack PDF link annotation
    • http://www.arredifunebri.com/images/coin-master-free-spins-cash_GM406889139.pdfIn PDF document text
    • http://www.arredifunebri.com/images/code-free-robux_GM431946152.pdfIn PDF document text
    • http://www.arredifunebri.com/images/roblox-builders-club-free_GM431946152.pdfIn PDF document text
    • http://www.arredifunebri.com/images/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://www.arredifunebri.com/images/spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.arredifunebri.com/images/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://www.arredifunebri.com/images/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.arredifunebri.com/images/coin-master-hack-online-download_GM406889139.pdfIn PDF document text
    • http://www.arredifunebri.com/images/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://www.arredifunebri.com/images/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://www.arredifunebri.com/images/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://www.arredifunebri.com/images/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://www.arredifunebri.com/images/robux-free-online_GM431946152.pdfIn PDF document text
    • http://www.arredifunebri.com/images/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://www.arredifunebri.com/images/how-to-get-free-spins-on-coin-master-2021-links_GM406889139.pdfIn PDF document text
    • http://www.arredifunebri.com/images/minecraft-pe-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://www.arredifunebri.com/images/coin-master-link-for-spins_GM406889139.pdfIn PDF document text
    • http://www.arredifunebri.com/images/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.arredifunebri.com/images/freecoins_GM406889139.pdfIn PDF document text
    • http://www.arredifunebri.com/images/make-free-robux_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_off0000475c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x475C 25788 bytes
SHA-256: 48a51c70776d9013a016a4bbaf2a1082c423319b1866b997c968c059a72d09f8
font_01_sfnt_off00008244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8244 18220 bytes
SHA-256: a643bdf6fb2c46f92d7d27c645ae746f9817b2095321c6eed50ee62637779c53

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