Malicious PDF — malware analysis report

Static analysis result for SHA-256 051ff2c232de4beb…

MALICIOUS

PDF

29.8 KB Created: 2020-06-07 22:30:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35b7a40109e6dada56039d5b7cfcaaac SHA-1: dd5fbb71abcb04bca61d8bd3cb2dc8bcff46d912 SHA-256: 051ff2c232de4beb959ab4d838b2fb09e33e71b6ea5dbf27f7a0db9b7ba58337
96 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, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The document body contains text that appears to be metadata and embedded URLs, suggesting a link farm or SEO spam tactic to direct users to potentially malicious content hosted on external domains.

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://host174.carmichaelnl.com/uploads/1/3/1/3/131383384/131383384.html#kara+%25C5%259Fim%25C5%259Fek+mp3+indir
    • http://theleawoodfamilydentist.com/uploads/1/3/0/5/130589158/2771385.pdf
    • http://webdisk.eastportfinancialgroup.ca/uploads/1/3/0/9/130969760/4b52442.pdf
    • http://streampulse.info/uploads/1/3/1/4/131482808/mosefejojezuwe-vudavupekebamu.pdf
    • http://kazcreations.org/uploads/1/3/0/4/130436313/nigaliduzobod.pdf
    • http://yakimagrocerygirls.com/uploads/1/3/0/3/130379326/e1415d857b25429.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://lipurenipagu.files.wordpress.com/2020/06/jadifesozobofopukenuledop.pdf
    • https://nojowijede.files.wordpress.com/2020/06/sidewokekovivasexixirifa.pdf
    • https://raridimi.files.wordpress.com/2020/06/noxajaxegenewedazi.pdf
    • https://dofanadidam.files.wordpress.com/2020/06/rukesotow.pdf
    • https://dawedigukas920094907.files.wordpress.com/2020/06/14351116059.pdf
    • https://jukawuf.files.wordpress.com/2020/06/zaxatafuk.pdf
    • https://zixovanofodi.files.wordpress.com/2020/06/98120702318.pdf
    • https://vakaximez.files.wordpress.com/2020/06/bikepe.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000481a.bin
ad8478b0c92fe55824a71dde3aac65c51ca1cabfe8a896f65264ee483d8e28dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x481A 10800 bytes

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