Malicious PDF — malware analysis report

Static analysis result for SHA-256 69ea63339d2c3389…

MALICIOUS

PDF

49.2 KB Created: 2020-03-09 04:02:49 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 6900e023ae112be46a460680395c20d2 SHA-1: 1c5017a3d4744a111a38a2b7b037db47a1019bf8 SHA-256: 69ea63339d2c33894406177ea47bd7cb49581b65ceb1af15a6e21c54743253d8
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links to other PDF files hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The embedded document body text, though partially corrupted, contains a URL that matches one of the extracted links, suggesting a deliberate attempt to direct users to external resources. The primary goal appears to be SEO manipulation or distributing further malicious content through these linked PDFs.

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://a1982767xstreamtravel.xsideas.com/uploads/1/3/0/5/130590279/130590279.html#passive+voice+with+modal+auxiliaries+exercises+with+answers
    • http://admin.ty-photography.com/uploads/1/3/0/6/130621093/jopevisolikov_rarisu.pdf
    • http://partnerscapitaledu.com/uploads/1/3/0/5/130588663/dofesugan.pdf
    • http://bhpaschoolinspain.com/uploads/1/3/0/6/130604395/kagewogezizawi.pdf
    • http://ginatheman.com/uploads/1/3/0/3/130324351/lebasuzu-gisegedenonus-nijep-dimenebi.pdf
    • http://lemoulinprive.com/uploads/1/3/0/7/130775726/8291311.pdf
    • http://denvermetroprotocols.org/uploads/1/3/0/3/130323335/jarisijapige.pdf
    • http://strategicipspecialists.com/uploads/1/3/0/7/130738637/814931237f63.pdf
    • http://www.corollacoffeeshop.com/uploads/1/3/0/7/130738497/8209079.pdf
    • http://mail.skylinewinetrail.com/uploads/1/3/0/6/130639463/pojepu.pdf
    • http://www.tophcpa.com/uploads/1/3/0/5/130539897/giluxolejex_luxamozoxoku.pdf
    • http://dsmclaughlin.com/uploads/1/3/0/4/130488920/2480270.pdf
    • http://www.devizesrunningfit.com/uploads/1/3/0/4/130476216/bolibajarexe.pdf
    • http://artstudiobydesigngallery.com/uploads/1/3/0/6/130605083/fcee6a4f9bbe.pdf
    • http://simbachile.com/uploads/1/3/0/5/130540146/vadinireripujiz-fituxud-muxesek.pdf
    • http://nextcap.us/uploads/1/3/0/4/130489075/7189575.pdf
    • http://my-oac.com/uploads/1/3/0/3/130379294/a5045d8b25.pdf
    • http://hostmaster.hairliner.com/uploads/1/3/0/7/130740597/juvugede.pdf
    • http://mikcleaning.fr/uploads/1/3/0/5/130539241/128e7.pdf
    • http://theredbeanstudio.com/uploads/1/3/0/7/130776529/4155191.pdf
    • http://www.dianapecciart.org/uploads/1/3/0/4/130436089/risilagegow.pdf
    • http://orderfishonline.com/uploads/1/3/0/3/130379060/5686852.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_off00007985.bin
57529e0293b6561043d697df2504503c2f9629ec80c488d5a4286fc9c8bd0ff6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7985 7772 bytes
font_01_sfnt_off000097a1.bin
1b0b9ccafa3a8d4187e86757028d03de598065db96186c0e11ce259314def278		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97A1 2684 bytes
font_02_sfnt_off0000a136.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA136 16036 bytes

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