Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ba8573a20c06337…

MALICIOUS

PDF

41.0 KB Created: 2020-04-04 16:06:30 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2026-05-08
MD5: 2b68fc48900716d021a224aa18d03f59 SHA-1: 470323b43fcdfba3f3a953e31c0e29d63ca26496 SHA-256: 7ba8573a20c0633760f2a0d1729d0bafa6bdc4bfc6b8e6156fe9a0e729902b82
96 Risk Score

Malware Insights

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

The PDF document 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 embedded document body text also contains one of these URLs, suggesting an intent to direct users to external content. While no scripts were explicitly extracted, the nature of the links and the ML classifier's high confidence indicate a malicious intent, possibly for SEO manipulation or to distribute further malicious content.

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://caitclements.org/uploads/1/3/1/4/131453061/131453061.html#atlas+de+histologia+normal+di+fiore+8va+edicion+pdf PDF link annotation
    • http://nicholeguerrette.com/uploads/1/3/0/7/130775276/4579322.pdfIn PDF document text
    • http://deborahannwong.com/uploads/1/3/1/4/131406354/jozeximixidivum_rewetivekokid_xibekezagiza.pdfIn PDF document text
    • http://erathcountyacreage.com/uploads/1/3/0/7/130776680/f821254adf7.pdfIn PDF document text
    • http://steveburketraining.com/uploads/1/3/0/9/130968957/wuvotonabedideja.pdfIn PDF document text
    • http://shymiahchanelextensions.com/uploads/1/3/0/9/130969920/3c6f4b187c1ce.pdfIn PDF document text
    • http://craigjacobson.net/uploads/1/3/0/2/130270894/satajito.pdfIn PDF document text
    • http://dk-electrical.org/uploads/1/3/1/4/131407281/6485935.pdfIn PDF document text
    • http://newwavepoolsandspas.com/uploads/1/3/0/4/130483606/914f961b4310.pdfIn PDF document text
    • http://trevier.net/uploads/1/3/0/8/130873818/bexolope_tuxefozur_gabogeki.pdfIn PDF document text
    • http://apromtech.com/uploads/1/3/0/5/130540504/pomodita.pdfIn PDF document text
    • http://callatinocaucus.org/uploads/1/3/0/2/130289333/2c8f270f7fe08d.pdfIn PDF document text
    • http://davidheydenrych.com/uploads/1/3/0/7/130739232/4e2ab3f1.pdfIn PDF document text
    • http://webmail.michelrivard.ca/uploads/1/3/0/6/130621669/silamosawara-luvoniwikaruj.pdfIn PDF document text
    • http://clicksncaptionsphotography.com/uploads/1/3/0/7/130739328/nojupo.pdfIn PDF document text
    • http://theangelcompany.net/uploads/1/3/0/4/130488544/moluni.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62A9 8556 bytes
SHA-256: 92e4e977ba8575ee8df4726e3e5880971a680b7bd26010ce2569c40b444880af
font_01_sfnt_off0000818e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x818E 16084 bytes
SHA-256: cd6e2214da57f5b11be58045a259cadbf00e25d96f42fa7f3a4e452f21d7d3e2

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