Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d840c26f6019c92…

MALICIOUS

PDF

43.3 KB Created: 2020-06-06 05:25:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5d3d059c9ad75f251c34c0827e478e0 SHA-1: 414aea354ff189d869e16181f5a4fa91611a359a SHA-256: 2d840c26f6019c92b93e51cb74f11bd217e2e9800a54c60729d75c0b98aede09
94 Risk Score

Malware Insights

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

The PDF document was flagged by an ML classifier with high confidence and contains a large number of external links, indicative of a link farm or redirection scheme. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this pattern, suggesting the document's primary purpose is to host numerous links to external sites. No scripts were extracted from this sample, and the document body contained only metadata and embedded URLs.

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://browniebites.ca/uploads/1/3/0/3/130323602/130323602.html#manual+mode+canon+80d
    • http://greenspawn.com/uploads/1/3/0/2/130273896/selarivi_gixepirutefaj.pdf
    • http://capitalareaschoolcounselors.org/uploads/1/3/1/4/131407692/padavukageweb-xabonewotalaba.pdf
    • http://uexplorers.com/uploads/1/3/1/4/131437978/bopokoruxivevexobuz.pdf
    • http://vizimath.net/uploads/1/3/0/8/130813992/bopen_xixevesigeg_doravurej.pdf
    • http://theequi.com/uploads/1/3/0/2/130289096/jejewemuluxukedufu.pdf
    • http://evolveracing.net/uploads/1/3/1/8/131856827/7088188.pdf
    • http://healthprojectsmexico.com/uploads/1/3/0/7/130740116/a87af9.pdf
    • http://nuiadeboschet.com/uploads/1/3/0/5/130588627/rabimojuduvan_tiraxetelek_dixonixixisesuj.pdf
    • http://packhack.us/uploads/1/3/0/8/130813738/sujax_jatanifezopa_desijefanu.pdf
    • http://lajollalouvre.com/uploads/1/3/0/7/130739817/2b262bc9907.pdf
    • http://webmail.beautifulbrowsorlando.com/uploads/1/3/1/4/131453096/ce016e70b872.pdf
    • http://browniebites.ca/uploads/1/3/0/3/130323602/terms.html
    • http://browniebites.ca/uploads/1/3/0/3/130323602/dmca.html
    • http://browniebites.ca/uploads/1/3/0/3/130323602/policy.html
    • https://vamukamavo.files.wordpress.com/2020/06/kisoluwaji.pdf
    • https://gifejaretel.files.wordpress.com/2020/06/dalamibexovusotofir.pdf
    • https://lulelin.files.wordpress.com/2020/06/sunefe.pdf
    • https://sabirixanep.files.wordpress.com/2020/06/89244486624.pdf
    • https://dazixapuj.files.wordpress.com/2020/06/14357841864.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d69.bin
11ae2452f886fd0ff89712d6de8c014adb21ac75f1bf75b99d5e489c1411d17b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D69 10488 bytes