Malicious PDF — malware analysis report

Static analysis result for SHA-256 3816b7c793949fb8…

MALICIOUS

PDF

37.1 KB Created: 2020-03-29 10:26:46 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: cec6b7b076e39e160f16701cf90de491 SHA-1: 16458425477a1233ec7089c1567c0ab9cc904ee3 SHA-256: 3816b7c793949fb8fb7e1706a2fc4d79b8bb16210c2bb46096fc00c6d8fcf185
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF document is identified as malicious due to its structure, which contains a large number of external links pointing to various domains. The document body, though partially obfuscated, contains a title related to medical criteria and also embeds URLs, suggesting a lure to external content. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, likely for SEO manipulation or to host 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://southernstylestudioandmore.com/uploads/1/3/0/7/130740256/130740256.html#criterios+de+centor+amigdalitis
    • http://sovereignfoodie.com/uploads/1/3/0/6/130620420/poxurodezuv-damawenapevam-pujulamo-gugalotodotid.pdf
    • http://priorlakemarinestorage.com/uploads/1/3/0/5/130589223/dukekoz.pdf
    • http://quickbuydevices.com/uploads/1/3/0/6/130620280/doxogamukabew.pdf
    • http://thesocceridcamp.com/uploads/1/3/0/5/130588639/zesedamareg-pakobovex.pdf
    • http://amersonhouse.org/uploads/1/3/0/7/130776676/sufobig.pdf
    • http://chunkeymonkey40.com/uploads/1/3/0/5/130588467/3febaa613.pdf
    • http://mail.standardkink.com/uploads/1/3/0/7/130775354/givorefidak_pejazirogakepi.pdf
    • http://mytrucutz.com/uploads/1/3/0/3/130379357/2532304.pdf
    • http://mrboldt.com/uploads/1/3/0/6/130639655/didefipetitimof-jusunusow-jurepebesek.pdf
    • http://emilybergerceramics.com/uploads/1/3/0/2/130289406/27946ce3438.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_off00006674.bin
b9e071a308959b9915a852b0b7c0ed0b10ad69c4422f087183c8c87df25b5ed6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6674 9312 bytes

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