Malicious PDF — malware analysis report

Static analysis result for SHA-256 b78cf9777f3d9f81…

MALICIOUS

PDF

21.6 KB Created: 2019-05-02 17:14:04 +01:00 Authoring application: mPDF 5.7
MD5: bfe3bc2c1e8f9482939274a04b5090c3 SHA-1: cc8bdec237401abf395d622b8b98a37fe086b57a SHA-256: b78cf9777f3d9f8152fc1f50f3bcac673b47cc487cbdcaac9fca42613824f7de
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to external PDF files. While many of these URLs are marked as benign, the sheer volume and the nature of the heuristic suggest a potential for malicious redirection or content hosting. The ML_NYX_PDF_MALICIOUS classifier also flagged the document with high confidence. No scripts were extracted from this sample, and the document body was unreadable, limiting further analysis of the specific intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

Heuristics 2

  • 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.
  • 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 http://loaminoo.linkpc.net/8095099091095091/Taking-Precautions-An-Intimate-History-of-Birth-Control-by-Shyama-Perera.pdf
    • http://loaminoo.linkpc.net/2096095092098099/Taking-Charge-of-Your-Fertility-The-Definitive-Guide-to-Natural-Birth-Control-Pregnancy-Achievement-and-Reproductive-Health-by-Toni-Weschler.pdf
    • http://loaminoo.linkpc.net/9097091091098095/Standard-and-Transmission-Based-Precautions-The-New-Infection-Control-System-by-Charles-A-Illian.pdf
    • http://loaminoo.linkpc.net/3092098099095095/Don-t-Panic-Taking-Control-of-Anxiety-Attacks-by-R-Reid-Wilson.pdf
    • http://loaminoo.linkpc.net/8095099092092094/A-History-of-Railroad-Accidents-Safety-Precautions-and-Operating-Practices-by-Robert-B-Shaw.pdf
    • http://loaminoo.linkpc.net/5098093090097094/Sweetening-the-Pill-Or-How-We-Got-Hooked-on-Hormonal-Birth-Control-by-Holly-Grigg-Spall.pdf
    • http://loaminoo.linkpc.net/7094091098094090/Why-Managing-Sucks-and-How-to-Fix-It-A-Results-Only-Guide-to-Taking-Control-of-Work-Not-People-by-Cali-Ressler.pdf
    • http://loaminoo.linkpc.net/2095095090093095/The-Gene-Therapy-Plan-Taking-Control-of-Your-Genetic-Destiny-with-Diet-and-Lifestyle-by-Mitchell-L-Gaynor.pdf
    • http://loaminoo.linkpc.net/9094095094092/Your-Energy-Works-taking-back-control-of-your-mental-emotional-and-physical-well-being-Volume-1-by-Richard-Joseph-Tierney.pdf
    • http://loaminoo.linkpc.net/6095092092093099/The-Bedroom-An-Intimate-History-by-Michelle-Perrot.pdf
    • http://loaminoo.linkpc.net/7093093093093096/The-Gene-An-Intimate-History-by-Siddhartha-Mukherjee.pdf
    • http://loaminoo.linkpc.net/8096092095098091/The-Gene-An-Intimate-History--PB-by-Siddhartha-Mukherjee.pdf
    • http://loaminoo.linkpc.net/4094098093096090/The-Earth-An-Intimate-History-by-Richard-Fortey.pdf
    • http://loaminoo.linkpc.net/3094093098091095/What-Is-Marriage-For-The-Strange-Social-History-of-Our-Most-Intimate-Institution-by-E-J-Graff.pdf
    • http://loaminoo.linkpc.net/2095096090096094/To-Have-And-To-Hold-An-Intimate-History-Of-Collectors-and-Collecting-by-Philipp-Blom.pdf
    • http://loaminoo.linkpc.net/2096096095093095/If-Walls-Could-Talk-An-Intimate-History-of-the-Home-by-Lucy-Worsley.pdf
    • http://loaminoo.linkpc.net/4099098092090099/Document-And-Eyewitness-An-Intimate-History-of-Rough-Trade-by-Neil-Taylor.pdf
    • http://loaminoo.linkpc.net/5090098099090099/Moving-Stories-An-Intimate-History-of-Four-Women-Across-Two-Countries-by-Alistair-Thomson.pdf
    • http://loaminoo.linkpc.net/1095094095093090/The-Whole-Of-Their-Lives-Communism-In-America-A-Personal-History-And-Intimate-Portrayal-Of-Its-Leaders-by-Benjamin-Gitlow.pdf
    • http://loaminoo.linkpc.net/2093098092092091/Birth-The-Surprising-History-of-How-We-Are-Born-by-Tina-Cassidy.pdf
    • http://loaminoo.linkpc.net/7094091098094090/Why-Managing-Sucks-and-How-to-Fix-It-A-Results-Only-Guide-t

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