Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebe39cbbe695d5f2…

MALICIOUS

PDF

49.6 KB Created: 2020-03-29 04:26:16 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 57f43f75d69177b8bfa25d2e6459d666 SHA-1: 231f98bd13fda18c3dde5208a84777cd99f5f774 SHA-256: ebe39cbbe695d5f2ebcc6870a4d81a21ef37a49fd9d2e0cdbb86399623646b43
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or a method to distribute malicious content across multiple sites. The document body contains garbled text and a reference to 'wkhtmltopdf', indicating it was likely generated programmatically. No scripts were extracted from this sample.

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://www.xmo1.com/uploads/1/3/0/4/130436147/130436147.html#como+convertir+de+dam+a+metro PDF link annotation
    • http://www.dropshiptrain.com/uploads/1/3/0/6/130621002/6a20d24fcbb73.pdfIn PDF document text
    • http://nowthenfuture.com/uploads/1/3/0/6/130621436/89469bb3a.pdfIn PDF document text
    • http://74-123-77-126.mgwnet.com/uploads/1/3/0/7/130775649/gamer.pdfIn PDF document text
    • http://artappraisalcarolina.com/uploads/1/3/0/3/130313215/8529361.pdfIn PDF document text
    • http://kloudninehairsalon.com/uploads/1/3/0/7/130739952/tiwage.pdfIn PDF document text
    • http://deannasgro.ca/uploads/1/3/1/3/131378952/bifirozojulofu_dagej.pdfIn PDF document text
    • http://lanzalillieproperty.com/uploads/1/3/0/8/130874097/lepugezekufif_fugelabex_xulobenaxirujo.pdfIn PDF document text
    • http://gullakemichigan.com/uploads/1/3/0/5/130539203/84e43b435dfc2.pdfIn PDF document text
    • http://www.makewavesviolinandviola.com/uploads/1/3/0/2/130272340/cea2860.pdfIn PDF document text
    • http://banchoryeastchurch.org/uploads/1/3/0/3/130379074/791832.pdfIn PDF document text
    • http://www.patriotsrisingforamerica.com/uploads/1/3/0/8/130874347/9974879.pdfIn PDF document text
    • http://www.bellalunaconsignment.com/uploads/1/3/0/6/130603942/83f058a.pdfIn PDF document text
    • http://mta-sts.mail.micahchristian.org/uploads/1/3/0/5/130544091/vomugotitinom-laganul-labige-rakuzururefojan.pdfIn PDF document text
    • http://buildpattern.site/uploads/1/3/0/2/130271113/furodizutekezizebo.pdfIn PDF document text
    • http://kylesingleton.com/uploads/1/3/0/2/130272333/kijetoberupokef.pdfIn PDF document text
    • http://yesonzforpvsd.com/uploads/1/3/0/3/130379271/mevilidumukobami.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
🗂 Part of campaign: micahchristian.org 5 samples

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000077b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77B4 9096 bytes
SHA-256: fc3ce49f805688f7c44f527f335e54f8d532c91ac9dec15187ef91d2d5a25299
font_01_sfnt_off000097a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97A3 2652 bytes
SHA-256: e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea
font_02_sfnt_off0000a10c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA10C 16272 bytes
SHA-256: d5f9e32382a42dbc1c5b2b9eb09109738d39d4897e0ec80874b7f78e32e02e66