Malicious PDF — malware analysis report

Static analysis result for SHA-256 613a0d531f1c6949…

MALICIOUS

PDF

46.1 KB Created: 2020-03-22 08:17:48 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9212239bc35c5e1b036c3734d7d4acdb SHA-1: 877441f5c197e560b98b49f185baf08a144f492a SHA-256: 613a0d531f1c69495fb3e83154dcf9a46f4c47b5164183a05dd318071dd7a8b9
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The primary URL points to a page discussing disaccharides, but the majority of the embedded links lead to other PDF files hosted on various domains. This suggests a link farm or SEO manipulation tactic, potentially to distribute malicious content or improve search rankings for unrelated sites.

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://growmygardens.com/uploads/1/3/0/5/130539340/130539340.html#disacaridos+mas+importantes+y+sus+funciones
    • http://hostmaster.satnetvisionltd.co.uk/uploads/1/3/0/3/130323424/9aee9dc9522.pdf
    • http://andrew-ash.com/uploads/1/3/0/6/130621535/pugovamadunasatidu.pdf
    • http://thecountryovenbakery.com/uploads/1/3/0/7/130739093/begejizi.pdf
    • http://discountfury.com/uploads/1/3/0/3/130379254/b0cb5151aea3df1.pdf
    • http://amandamccreary.org/uploads/1/3/0/6/130605373/pomadesoriseg.pdf
    • http://aydenpugh.com/uploads/1/3/0/5/130543878/8511908.pdf
    • http://ferrona.com/uploads/1/3/0/5/130588650/zudunejumulob.pdf
    • http://careersclub.org/uploads/1/3/0/5/130538996/medosasukutafem_zaxunevolira_nokogixalulajir_fupujexar.pdf
    • http://celebrationandpartysupplies.com/uploads/1/3/0/4/130477864/2222619.pdf
    • http://quantumleap-pr.co.uk/uploads/1/3/0/8/130873983/1912490.pdf
    • http://www.obreiki.com/uploads/1/3/0/4/130483242/sovuxumalofivalu.pdf
    • http://rostelekomrt.host/uploads/1/3/0/3/130324044/08af5c.pdf
    • http://thomassackville.com/uploads/1/3/0/6/130604074/babadurapizag_vulajewezajiv_feludij_meporeman.pdf
    • http://neuropathydr.net/uploads/1/3/0/6/130604530/zovexukok.pdf
    • http://hostmaster.englishlearningexpert.com/uploads/1/3/0/9/130969683/8d0e21ce0c.pdf
    • http://boldposters.com/uploads/1/3/0/4/130488569/nelej.pdf
    • http://jaynehillman.com/uploads/1/3/0/7/130738794/vudapu-pibusesojat-tawazoduxarise.pdf
    • http://atechnology.org/uploads/1/3/0/8/130874497/b1f73d6.pdf
    • http://mail.ficgn.org/uploads/1/3/0/6/130640071/sumutikez_dokuvadirozor_netesebegom.pdf
    • http://forethehousegolf.com/uploads/1/3/0/4/130476778/8924258.pdf
    • http://akinoimages.com/uploads/1/3/0/8/130873850/9ab952952.pdf
    • http://newedgepartners.com/uploads/1/3/0/8/130874015/882f3cd7e74fe.pdf
    • http://www.moshathestylist.com/uploads/1/3/0/6/130620965/a53ff66.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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073cf.bin
cd0e4ef08b6572d9b7fa2f315a133f0f22c7c5f1503a66f32997ae52a0ef5445		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73CF 8764 bytes
font_01_sfnt_off000093b1.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93B1 16036 bytes

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