Malicious PDF — malware analysis report

Static analysis result for SHA-256 544228d2e351ec98…

MALICIOUS

PDF

35.8 KB Created: 2020-06-09 03:14:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27e3a57fad10565f5440313268932e66 SHA-1: f5c5f980963888e4a4269b8a4e9b7584722f4d5d SHA-256: 544228d2e351ec981b8703cfbf1378f16ad4d9488e0ae3728324a6a2776b0578
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious. It contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files hosted on different domains. The document body text, though partially corrupted, contains some of these URLs, suggesting the primary purpose is to act as a link farm. This technique is often used for SEO manipulation or to distribute further malicious content.

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://root.tabletopcommunications.com/uploads/1/3/1/3/131381901/131381901.html#annabel+lee+edgar+allan+poe+espa%25C3%25B1ol
    • http://kukamumu.com/uploads/1/3/1/4/131483068/8233741.pdf
    • http://charlenemuhammad.com/uploads/1/3/0/4/130483354/cdd3d53c437573b.pdf
    • http://ea-photos.com/uploads/1/3/0/4/130476616/fipigutevexog.pdf
    • http://integratingartists.com/uploads/1/3/0/6/130621165/miwafenexurepimel.pdf
    • http://thawhead.com/uploads/1/3/0/5/130590180/pizataradun.pdf
    • http://kellysouthernwoodcrafts.com/uploads/1/3/1/4/131406510/4fcd672b373d2.pdf
    • http://probionsa.net/uploads/1/3/1/6/131637024/zaxixalofi.pdf
    • https://dazixapuj.files.wordpress.com/2020/06/14357841864.pdf
    • https://wepaxixip.files.wordpress.com/2020/06/96692626585.pdf
    • https://daralet.files.wordpress.com/2020/06/daxumefoforexoladagot.pdf
    • https://kikujasut.files.wordpress.com/2020/06/lokumajoxenepitoxesif.pdf
    • https://pusaminal391819561.files.wordpress.com/2020/06/74862552947.pdf
    • https://lewarakorin.files.wordpress.com/2020/06/66678813931.pdf
    • https://kekuzupi.files.wordpress.com/2020/06/50377663682.pdf
    • https://tazalolej410971325.files.wordpress.com/2020/06/dewejilepikibiti.pdf
    • https://selomine691511454.files.wordpress.com/2020/06/43009641211.pdf
    • https://jurikebigox883042776.files.wordpress.com/2020/06/dixudojonenetujajawimege.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_off00005d5e.bin
3bf53cbb7f5ff7bf57a94c71d1dffa11a73084e867e3c750ffb2cfb71a91a251		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D5E 11692 bytes

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