Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd4524f7f7236701…

MALICIOUS

PDF

39.7 KB Created: 2020-05-25 06:26:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a8a3013fa47c97ea2094c35b3ead1e5 SHA-1: 039ae74de3afdc69b0bd4a43e5e9dd9068245231 SHA-256: cd4524f7f7236701bc957dd58a93b87e59cda598118ee075ddd123439036354b
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier with high confidence. It contains a large number of external links, many of which point to domains that appear to be part of a link farm designed to host SEO-optimized PDF files. This suggests a phishing or malware distribution campaign. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9915

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://webdisk.kalenit.com/uploads/1/3/0/7/130775199/130775199.html#lg+49lj510m+review
    • http://shopmagnoliarootsonline.com/uploads/1/3/0/5/130538816/vadumifetimurana.pdf
    • http://webmail.bienfemme.com/uploads/1/3/1/6/131637464/8066647.pdf
    • http://iotwstudio.org/uploads/1/3/1/4/131407057/solaxotizak-zijeva.pdf
    • http://thelollipopshoppe.net/uploads/1/3/1/4/131453850/pofowizideja.pdf
    • http://domadialaw.com/uploads/1/3/0/5/130544790/7946570.pdf
    • http://mytgob.com/uploads/1/3/0/4/130483422/ddd89425856703.pdf
    • http://squarepeglife.com/uploads/1/3/0/4/130476471/mukesemaz.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_off00006df7.bin
c28f80e3b4242344d994c6f764cf631458e27ac2f66c2ef02fa23cb8d7dac9f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF7 11304 bytes

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