Malicious PDF — malware analysis report

Static analysis result for SHA-256 61848330697131f3…

MALICIOUS

PDF

40.2 KB Created: 2020-03-27 09:39:37 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 203058b14dc81dcbf496701d2297d906 SHA-1: 0e85b6917c442cf1e910cb7ec12ab8ee80ad472a SHA-256: 61848330697131f39b361bcac0d3423cf9d2ba7578394b0e2bfa7f0aec895c9f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. The ML classifier also flagged this PDF as malicious with high confidence. The embedded document body text, though partially corrupted, contains a URL that aligns with the link farm activity.

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://christinafriedle.org/uploads/1/3/0/5/130588740/130588740.html#penn+state+main+campus+gpa+calculator
    • http://ewa4ewa.us/uploads/1/3/0/5/130589031/tuligamotofaxalusoja.pdf
    • http://newoxygen.org/uploads/1/3/0/5/130543141/joxakorado-gemexek.pdf
    • http://thechurchlawgroup.com/uploads/1/3/0/4/130436141/mudaxi-begoponenixotu-fupazos-danifed.pdf
    • http://boutiquecharando.com/uploads/1/3/0/6/130605492/fb17d5b3.pdf
    • http://historyproject.club/uploads/1/3/0/4/130476492/vikalubupafudofa.pdf
    • http://www.recyclingartsdepartment.com/uploads/1/3/0/2/130272406/xodamo.pdf
    • http://ramwikstudio.com/uploads/1/3/0/5/130540009/fc6863.pdf
    • http://glammodo.com/uploads/1/3/0/6/130622011/daboravogedoto.pdf
    • http://mol650eraywebster.com/uploads/1/3/0/7/130775491/9141201.pdf
    • http://reachdigitalconsulting.com/uploads/1/3/0/3/130323339/5143591.pdf
    • http://shuttercraft.nz/uploads/1/3/0/4/130493714/gorivaremaf.pdf
    • http://www.wokeflow.com/uploads/1/3/0/8/130813785/4b67dd8ca6e68cd.pdf
    • http://mail.puntonetservice.com/uploads/1/3/0/3/130323532/fafilaja.pdf
    • http://nickelplatebarandgrill.com/uploads/1/3/0/7/130775658/1308842.pdf
    • http://stikitgraphics.com/uploads/1/3/0/3/130324137/fazafomolimefev-dipomeno-mitimubawivisa.pdf
    • http://advancedoptimalhealthcare.com/uploads/1/3/0/5/130551418/segezajovewev.pdf
    • http://pastrycorner.org/uploads/1/3/0/4/130435811/af96aca53.pdf
    • http://sokyokushin.org/uploads/1/3/0/5/130590336/renifanadijumediral.pdf
    • http://banartificialdye.org/uploads/1/3/0/5/130540937/subowazoforivop.pdf
    • http://thimori.com/uploads/1/3/0/6/130640227/poniravudak_monumeposi_fivipotatot.pdf
    • http://www.donnadoss.com/uploads/1/3/0/4/130476229/mejevofe-duganilunurela-ninakonajazo-wevofa.pdf
    • http://kellinewby.com/uploads/1/3/0/8/130874430/1f93e3.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_off0000735b.bin
1afe954d007e8c36d87cbda592ded400d1a5081fe754a92779b5daea95a4d271
pdf-font-stream PDF embedded font (sfnt) at offset 0x735B 8300 bytes