Malicious PDF — malware analysis report

Static analysis result for SHA-256 37333266cee93952…

MALICIOUS

PDF

35.7 KB Created: 2020-06-11 15:57:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa22964867bda1799d2e525f04748242 SHA-1: 1b9d270fb10d3b2dcccfafff27057c7ee9fa8380 SHA-256: 37333266cee9395215095980f594e3fa05c67d5a448ae485cb2e3620979d159d
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, pointing to various domains. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains references to the URLs, suggesting a link farm or redirection scheme. The primary intent appears to be directing users to a network of external PDF files, potentially for SEO spam or to host further malicious content.

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://karen-griffiths.com/uploads/1/3/0/4/130483096/130483096.html#ultimate+wow+guide+review
    • http://hostmaster.honoraryhotel.net/uploads/1/3/1/4/131409597/suvafojebupofaj_zotonovobozuf_muxuwu_nabuxut.pdf
    • http://dementiacareqb.com/uploads/1/3/1/3/131378795/watarafodisurutul.pdf
    • http://djsbilliger.de/uploads/1/3/0/7/130740514/vidiravavoxil.pdf
    • http://hubertwilliamsvoice.com/uploads/1/3/0/5/130539267/6290091.pdf
    • http://equityx.net/uploads/1/3/0/8/130813420/jezaz.pdf
    • http://cvboysbasketball.com/uploads/1/3/1/4/131437813/nodenanudafigarom.pdf
    • http://longgrainhardwoods.com/uploads/1/3/0/6/130604269/jatowebetusetokizuf.pdf
    • http://theaddcouple.com/uploads/1/3/1/4/131453871/sezox.pdf
    • http://hostmaster.tapping-point.com/uploads/1/3/0/5/130542965/4463983.pdf
    • http://mta.safehavenworship.com/uploads/1/3/0/7/130740492/kuxavanu-kijunezavo-zifab.pdf
    • https://josejoxoboko.files.wordpress.com/2020/06/45815204993.pdf
    • https://luxotamataxo.files.wordpress.com/2020/06/43218691147.pdf
    • https://kakonowa.files.wordpress.com/2020/06/sewukakuwubogumujajo.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_off00005e79.bin
5819fed8b32fb96e5970b06c951a61a82fd21d832c08ddcd842a7b23b53b1cb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E79 11024 bytes

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