Malicious PDF — malware analysis report

Static analysis result for SHA-256 44382d1b3812235e…

MALICIOUS

PDF

35.8 KB Created: 2020-06-12 09:20:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e73aaa2c924b17d0713ae5e63b15036c SHA-1: 4b04ba97571017eee23eec83c1b2fb765a3d85ce SHA-256: 44382d1b3812235e43e3de743fc6581ee806190fe413b901ce509986cb0db0f4
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and embedded URLs, suggesting a link farm or redirection scheme designed to lead users to potentially harmful content hosted on external domains. No scripts were extracted from this sample.

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://authorpreneurworkshops.org/uploads/1/3/1/4/131452904/131452904.html#de+xps+para+pdf
    • http://sjkrohn27.com/uploads/1/3/0/5/130538985/kiwusutuxelaz.pdf
    • http://connectwellness.org/uploads/1/3/1/8/131872153/luwenazoneni-tawenexapev-podopaxene-mutek.pdf
    • http://verkeste.com/uploads/1/3/1/6/131606365/zuxazonawegav.pdf
    • http://fullbelleconsulting.com/uploads/1/3/0/9/130969315/2715225.pdf
    • http://nmsyearbook.com/uploads/1/3/0/7/130775643/6438132.pdf
    • http://alisoviejovet.preview.pethealthnetworkpro.com/uploads/1/3/2/3/132303229/5662554.pdf
    • http://aktivtrom.no/uploads/1/3/1/3/131379443/jaxasodelawep.pdf
    • https://naxopovo.files.wordpress.com/2020/06/pejiwuvazaxaji.pdf
    • https://tekunotu.files.wordpress.com/2020/06/napazoli.pdf
    • https://lagupok392153502.files.wordpress.com/2020/06/11349715037.pdf
    • https://naxuror.files.wordpress.com/2020/06/xuvopovewapuw.pdf
    • https://vifozezemixa.files.wordpress.com/2020/06/guvutuv.pdf
    • https://selusizaf.files.wordpress.com/2020/06/ropusu.pdf
    • https://zowidunu.files.wordpress.com/2020/06/jotapuvu.pdf
    • https://sinegimagex.files.wordpress.com/2020/06/84011144122.pdf
    • https://wikanoxegi.files.wordpress.com/2020/06/wuzegitenujujirukupuxe.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_off00005d0c.bin
e5830a747afd3a19d38b4765c5b6f495c287ee7cf2123e1aea10e4c3d955d7f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D0C 12028 bytes

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