Malicious PDF — malware analysis report

Static analysis result for SHA-256 1250c14a4bb8b836…

MALICIOUS

PDF

39.6 KB Created: 2020-04-18 10:49:44 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5b873dc62eb8d8bf351e951c8fb9fa31 SHA-1: 5dc320ed299bfe39beb4e76d68f503f6b4ed8972 SHA-256: 1250c14a4bb8b836853d84c98d039346265454388394b9d124998c07b0bcfee9
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded external links, identified as a link farm, suggesting a malicious SEO or content distribution scheme. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and extensive URL usage indicate a likely attempt to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://peakscentre.com/uploads/1/3/1/4/131452884/131452884.html#yang+ming+line+telex+release+format
    • http://jr-proformance.nl/uploads/1/3/0/8/130874015/mosafedul.pdf
    • http://ccaputolaw.com/uploads/1/3/1/4/131454178/fowovevuxuwalo_sepiloxolodoju_gevetep.pdf
    • http://escensio.com/uploads/1/3/0/5/130543877/giluxukad.pdf
    • http://krystalklearmedia.com/uploads/1/3/0/2/130287311/1405622.pdf
    • http://nehadavaluri.com/uploads/1/3/1/3/131383204/rubawejezomip.pdf
    • http://perendies.com/uploads/1/3/1/4/131483356/a4f93.pdf
    • http://orianazens.com/uploads/1/3/1/6/131636834/2345180.pdf
    • http://irokopostbooks.com/uploads/1/3/0/5/130538995/nexemafilisuf.pdf
    • http://alphastoneandtile.com/uploads/1/3/1/3/131398243/zewigejan.pdf
    • http://cvrejuvenation.com/uploads/1/3/0/6/130620370/7db3c.pdf
    • http://precociouspetalsgifts.shop/uploads/1/3/0/9/130969438/sewulusejexopi.pdf
    • http://8333royalridgephotogallery.com/uploads/1/3/0/4/130476104/8650736.pdf
    • http://goldgtechnology.com/uploads/1/3/0/7/130775707/jatozisanuviledaz.pdf
    • http://maconsummerfest.org/uploads/1/3/0/4/130477372/0f42c7980c8.pdf
    • http://dccircular.com/uploads/1/3/0/6/130605084/gapesamujokewal.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_off00007229.bin
431498b18d6ba2b7287bcf94d7446bca5a0e45f72d95024d9aae8dfad4f6b07d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7229 7756 bytes

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