Malicious PDF — malware analysis report

Static analysis result for SHA-256 0112b8bdc4f61f58…

MALICIOUS

PDF

49.6 KB Created: 2020-03-30 07:13:17 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a16ebbbe9f8202223d169928da6b0b54 SHA-1: a66eaeb4e431cf6c3dbd10b59a4c3ae5088f5ac1 SHA-256: 0112b8bdc4f61f5880821d3213bcf331ca6d663379fcaeb36cb8672f2194d038
96 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The embedded document body text, though partially corrupted, also contains one of these URLs. The primary purpose appears to be directing users to a network of websites, likely for SEO spam or to host further malicious content.

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://thehappygirlstore.com/uploads/1/3/0/6/130639240/130639240.html#resumen+parabola+el+trigo+y+la+ciza%C3%B1a
    • http://lakeplacidvision.com/uploads/1/3/0/5/130590117/wawixojiwel.pdf
    • http://ironbullfarmllc.com/uploads/1/3/0/3/130312965/togamuvub.pdf
    • http://charlestonvillagehall.co.uk/uploads/1/3/1/4/131406505/c1c9506aa5cb.pdf
    • http://martiwalsh.com/uploads/1/3/0/6/130620687/kubefojapeguxa_benunizibopax_dejaluwipuwukuk_kedegadojej.pdf
    • http://homesteadingknowledge.com/uploads/1/3/0/2/130270798/kumuvaxoke_wijovulujivi_tikurajob.pdf
    • http://judgeappraisals.com/uploads/1/3/1/4/131437784/daxafutaxenaxe_pewubafapiku_tiguta_luguvasinagob.pdf
    • http://flexcfo.net/uploads/1/3/0/6/130620632/1252487.pdf
    • http://badlandsflagcompany.com/uploads/1/3/0/6/130639183/wafuduselev_fubabulafogus.pdf
    • http://creekwoodorchestra.net/uploads/1/3/0/3/130312971/topide_tosomebosal_xasonux_diripokulesip.pdf
    • http://cpanel.chsmarketplace.com/uploads/1/3/0/5/130551241/faziz.pdf
    • http://marieandrees.com/uploads/1/3/0/5/130540461/pujavaposaluvaramef.pdf
    • http://fadychiropractic.com/uploads/1/3/1/0/131070695/wizulitejukil_rububofebifulu_jagujexatu.pdf
    • http://alchemystejuice.com/uploads/1/3/1/3/131379636/5575545.pdf
    • http://supernoobgaming.org/uploads/1/3/0/4/130489467/mojozebofa.pdf
    • http://gayeboston.com/uploads/1/3/0/4/130435813/265e61ea.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007808.bin
7676e6d01b870233857686ddde2dc631510cdb01c0d4b69a77e0482642545d65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7808 9224 bytes
font_01_sfnt_off00009948.bin
e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9948 2652 bytes
font_02_sfnt_off0000a2af.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2AF 16036 bytes

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