Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3e7c3398c12752c…

MALICIOUS

PDF

48.2 KB Created: 2020-03-30 03:12:42 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 6e115bc0316a83dabbba663cc95e1648 SHA-1: 6fb39a7838f294da3c47cebdab2b4e673e2e9f6b SHA-256: f3e7c3398c12752c9b387e5d5b01cc0da201219f9c98cca8eb4a732ff3f11c8c
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or SEO spam campaign. The embedded document body text, though heavily obfuscated, contains a URL that is also present in the list of external links. 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://richter-family.rominastiebenphotography.com/uploads/1/3/0/7/130775563/130775563.html#universidad+icep+la+piedad PDF link annotation
    • http://rocklinpictures.com/uploads/1/3/0/7/130776607/1258179.pdfIn PDF document text
    • http://absonabudget.com/uploads/1/3/0/4/130476700/da14797a54a02e.pdfIn PDF document text
    • http://ihateyourmovie.com/uploads/1/3/0/8/130814293/sawuribomen_gelerukeneju_zodimajutitufe.pdfIn PDF document text
    • http://coirnect.com/uploads/1/3/0/3/130323103/tamilovafi_wafazawaxawu_tuguji.pdfIn PDF document text
    • http://olaliliana.com/uploads/1/3/0/2/130292014/witiku.pdfIn PDF document text
    • http://msestate.co.jp/uploads/1/3/0/5/130551949/3760975.pdfIn PDF document text
    • http://jmconstruction.info/uploads/1/3/0/6/130620912/lokivo-mukubu.pdfIn PDF document text
    • http://mail.twinwatershealing.net/uploads/1/3/0/2/130289755/b6f4cfbd9f06e.pdfIn PDF document text
    • http://canarm.net/uploads/1/3/0/2/130273578/4533663.pdfIn PDF document text
    • http://peachstatediesel.com/uploads/1/3/0/4/130476389/fepakapiw.pdfIn PDF document text
    • http://keyconnect.net/uploads/1/3/0/7/130776739/mabelotibo.pdfIn PDF document text
    • http://superiorhomesllc.net/uploads/1/3/0/6/130604126/4731556.pdfIn PDF document text
    • http://ccsps.info/uploads/1/3/0/5/130539583/janarebesex.pdfIn PDF document text
    • http://pebblebeachgolfnow.com/uploads/1/3/1/0/131071062/1841122.pdfIn PDF document text
    • http://ultimatedanceexp.com/uploads/1/3/0/7/130775173/7041776.pdfIn PDF document text
    • http://imaanconstruction.com/uploads/1/3/0/6/130621852/pewoliruwiro.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74EF 8692 bytes
SHA-256: ebe9be1009fb96b41aa2c7edb04e25513b4066e80b27f0316ec415727eca018e
font_01_sfnt_off000094b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94B1 2652 bytes
SHA-256: e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc
font_02_sfnt_off00009e18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E18 16036 bytes
SHA-256: 779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63