Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ee767c0f4506bc2…

MALICIOUS

PDF

36.6 KB Created: 2020-06-04 15:32:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fbeb48d4b886dc4e5011ff81204de8cb SHA-1: dbf864980d0b3722aa47169c1ec12fd3b54cb6fe SHA-256: 1ee767c0f4506bc256e904d3203ef27793413f1dbbcf19d0c5c28c43d43f3bfe
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The document body, though heavily obfuscated, contains references to '5kw solar inverter datasheet' and the authoring application 'wkhtmltopdf', suggesting a lure to potentially malicious or SEO-manipulated content. The primary attack pattern involves directing users to a vast network of linked PDFs, likely for malicious distribution or SEO poisoning.

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://trainandtransform.info/uploads/1/3/0/7/130738527/130738527.html#5kw+solar+inverter+datasheet
    • http://createeveryday.com/uploads/1/3/0/3/130379804/6f56f85.pdf
    • http://nextlevelproperties.org/uploads/1/3/0/6/130605388/3174470.pdf
    • http://dfainvestigations.com/uploads/1/3/0/7/130776667/1793436.pdf
    • http://alexotooleart.com/uploads/1/3/1/4/131453449/fofib.pdf
    • http://pepperminttrail.com/uploads/1/3/0/7/130740244/gofoluxefutod.pdf
    • http://mta-sts.mail.darknoiseproductions.com/uploads/1/3/1/4/131406578/nolowuv-xavufinal.pdf
    • http://louisaspeaks.com/uploads/1/3/0/5/130540219/gefefexotewuxib-dogoxalujifo.pdf
    • http://buzzboo.com/uploads/1/3/0/8/130814728/kufuz.pdf
    • http://server.wallybissett.com/uploads/1/3/0/8/130874539/navidagokonovuz-novusu.pdf
    • http://solar-consulting.net/uploads/1/3/0/4/130435556/vadodekima.pdf
    • http://torcontracting.net/uploads/1/3/0/6/130620620/ebea74.pdf
    • http://peoplepathwaysplace.com/uploads/1/3/0/6/130604649/moxinebexav_wapopalapava_jugagig_vawuloxi.pdf
    • http://trainandtransform.info/uploads/1/3/0/7/130738527/terms.html
    • http://trainandtransform.info/uploads/1/3/0/7/130738527/dmca.html
    • http://trainandtransform.info/uploads/1/3/0/7/130738527/policy.html
    • https://panupobeguki443392900.files.wordpress.com/2020/06/xegibugagezopepuj.pdf
    • https://rolabetupi.files.wordpress.com/2020/06/42460990322.pdf
    • https://wegekivosum.files.wordpress.com/2020/06/98864579771.pdf
    • https://kogubala.files.wordpress.com/2020/06/66956020301.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_off00006254.bin
386c9eacb32be8c5ababd383d0eaf9dab28d2acd7f8757db3564ea329b295eb2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6254 10732 bytes