Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a0d5714818d0ae8…

MALICIOUS

PDF

33.6 KB Created: 2020-06-12 00:27:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f489f2ff7732117ca9002bf4f1ff9a8b SHA-1: 0b1e14e2fd49bbeaea2b8bdf26295811402a9eed SHA-256: 2a0d5714818d0ae858df5f3b3bb87054a14a7acb692da3d7409f7ceb57c39ba6
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file was flagged by an ML classifier as malicious and contains a large number of external links, characteristic of a link farm. The heuristic PDF_SEO_LINK_FARM specifically indicates a mass of external PDF links, with encountermanagementsystem.com being a dominant host. While no scripts were extracted, the sheer volume and nature of the embedded URLs suggest a malicious intent, likely to manipulate search engine results or distribute further malicious content through the linked PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://ashpeters.net/uploads/1/3/0/6/130639203/130639203.html#nuestras+sombras+maria+teresa+budge+pdf
    • http://encountermanagementsystem.com/uploads/1/3/1/3/131380641/1354795.pdf
    • http://ideasustainability.com/uploads/1/3/0/7/130776149/loxapovupusexulifu.pdf
    • http://fiveshortblastsshoreham.com/uploads/1/3/0/6/130620423/dexuwabivawe-nigutunu-viram.pdf
    • http://74-123-78-212.mgwnet.com/uploads/1/3/0/5/130539373/zepazakutuzitum.pdf
    • http://techdirectorsclub.com/uploads/1/3/0/9/130969937/6694c4e2ce5.pdf
    • http://bmarkbenefits.com/uploads/1/3/0/6/130620530/nejituwijo.pdf
    • http://ninjadrone.pro/uploads/1/3/0/5/130551859/tivososevoroxibazi.pdf
    • http://lisarsmithspiritualquest.com/uploads/1/3/0/7/130738812/netojediroxu-pojiwokevi.pdf
    • https://fojajuxebi.files.wordpress.com/2020/06/76069411502.pdf
    • https://pegubup.files.wordpress.com/2020/06/sopopi.pdf
    • https://janolapanak.files.wordpress.com/2020/06/sowogegep.pdf
    • https://vorosatigeb.files.wordpress.com/2020/06/webafidaworedejepodefo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005901.bin
3bc072d331dc5645f03781f97a5a833f26b10331c8e22ae160091e7f870c23a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5901 10544 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.