Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d8ea29ca8959ca4…

MALICIOUS

PDF

36.1 KB Created: 2020-03-14 21:39:11 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d2f771afa13fc61a5f670510dab81ea8 SHA-1: 7170180ff86d4352dff2904036946e2ce1ed012b SHA-256: 8d8ea29ca8959ca4e4a1e6c6222d4c4664c2320b806f219270258ce9b6f4d971
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or distribution network. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves directing users to these external resources, which could host further malicious content or be used for SEO manipulation.

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://london-office-5.pleasingfood.com/uploads/1/3/1/0/131070501/131070501.html#fc+barcelona+wallpaper+free
    • http://mail.cowellcreations.ca/uploads/1/3/0/2/130270832/miduf_goseviwa_fizal_vibukusivaz.pdf
    • http://celebratinggodscreation.org/uploads/1/3/0/2/130289504/0663968f.pdf
    • http://skipandgive.org/uploads/1/3/0/6/130603966/901eb3b2c2aa6a.pdf
    • http://www.bktllc.com/uploads/1/3/0/2/130288589/46c56dc7caa.pdf
    • http://formidablecorp.org/uploads/1/3/0/6/130604988/7ced86.pdf
    • http://www.thurmondfarms.com/uploads/1/3/0/6/130621963/2eea89e.pdf
    • http://nutritionalbiochemistryresearchgroup.org/uploads/1/3/0/5/130551103/xilopibebigisixiweba.pdf
    • http://christopherbirchmd.com/uploads/1/3/0/4/130475918/zujivujitesut-lusan-pomimujefefa-golukidojasew.pdf
    • http://ckfacials.com/uploads/1/3/0/5/130539842/1572284.pdf
    • http://www.mlmultiservice.com/uploads/1/3/0/5/130540176/puzofefap.pdf
    • http://zingcomic.com/uploads/1/3/0/5/130542875/kifipipuxabetaxoxuxe.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_off00006343.bin
aeba11b8799c5225d48c1c6c8aa74bdabd2c16ca2c50265dcd36169cd8108349		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6343 8104 bytes

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