Malicious PDF — malware analysis report

Static analysis result for SHA-256 289c3867ec59f683…

MALICIOUS

PDF

35.7 KB Created: 2020-06-07 17:12:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0cdd1c374839d64164cb294e45a44013 SHA-1: 6d7fa9e975e43faf2b6af284d42129352dd3d927 SHA-256: 289c3867ec59f683582fb7b91ea0939e991aa85c63fc4b5a6e209c9716a272b3
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm. The document body is heavily corrupted, but the presence of URLs suggests the primary intent is to drive traffic to external resources.

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://m-zitko.si/uploads/1/3/0/2/130291434/130291434.html#servi%25C3%25A7o+de+convivencia+e+fortalecimento+de+vinculos+recursos+humanos
    • http://opnv.sbrsd.org/uploads/1/3/0/5/130588475/1945144.pdf
    • http://todayscutnyc.com/uploads/1/3/1/4/131453127/2391150.pdf
    • http://mail.globalconnectionafrica.org/uploads/1/3/1/0/131071076/dff20912.pdf
    • http://cleanerblue.com/uploads/1/3/0/4/130477864/boxupoxen.pdf
    • http://atashaarmstrong.com/uploads/1/3/1/3/131383329/1244155.pdf
    • http://peak-patents.com/uploads/1/3/1/4/131453084/moxovaninivusox.pdf
    • http://livingwith-msand-aps.com/uploads/1/3/0/4/130483584/5505725.pdf
    • http://cedarvalleyeats.com/uploads/1/3/0/4/130483863/tuvap.pdf
    • http://densitymonitor.densityanalytics.com/uploads/1/3/0/7/130775643/bb3636a9.pdf
    • http://jakedweber.com/uploads/1/3/0/6/130604850/2943f0.pdf
    • http://everycolorsapphire.com/uploads/1/3/0/6/130605490/5179970.pdf
    • http://buyflamingocards.co.uk/uploads/1/3/0/5/130551391/jinotixejirowu-fowuraxame.pdf
    • https://demexikil.files.wordpress.com/2020/06/wegesowovofo.pdf
    • https://medidiri.files.wordpress.com/2020/06/82277629143.pdf
    • https://sebogoveb.files.wordpress.com/2020/06/72717935305.pdf
    • https://jupukefef.files.wordpress.com/2020/06/22861060941.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_off00005a99.bin
aac9ef1a5f4603e39e89c53e210ef52546756def659ede98e3a376e2b0ebd083		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A99 12200 bytes

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