Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e80cd151ffe4877…

MALICIOUS

PDF

62.1 KB Created: 2020-03-26 11:56:02 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 8b007f242d486aad6fd934f1b453d429 SHA-1: d120fca04276e584e3f3e98b2f98b600ea3dca73 SHA-256: 4e80cd151ffe48774dd815bfc131bc006b3c55e7f2199b10208d96cd855de7a8
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, many of which point to similarly structured URLs on different domains. This behavior is indicative of a link farm or SEO manipulation tactic, potentially used to drive traffic to malicious sites or to obscure the true destination of the links. The document body, though heavily obfuscated, contains a reference to a nursing care plan, suggesting a lure to attract unsuspecting users.

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://marikacleaningservice.com/uploads/1/3/0/7/130775961/130775961.html#pancreatitis+nursing+care+plan PDF link annotation
    • http://www.architects4christ.com/uploads/1/3/0/3/130323120/7b73d59.pdfIn PDF document text
    • http://www.100menrgv.com/uploads/1/3/0/2/130271117/dukaxarosusozopase.pdfIn PDF document text
    • http://scientificintl.com/uploads/1/3/0/5/130539188/muxomafuku-dogep-vajimejo.pdfIn PDF document text
    • http://www.soulboyroy.com/uploads/1/3/0/7/130775753/megavifexag.pdfIn PDF document text
    • http://slcltd.org/uploads/1/3/0/8/130874585/jojorimazige-wezefanun-puxuwuxal.pdfIn PDF document text
    • http://golden-aquarium.com/uploads/1/3/0/5/130551836/b47e6cf75a.pdfIn PDF document text
    • http://mowmylawnonline.com/uploads/1/3/0/2/130289722/5138e77704.pdfIn PDF document text
    • http://ckfacials.com/uploads/1/3/0/3/130313748/jowuw.pdfIn PDF document text
    • http://www.cancunmodels.com/uploads/1/3/0/8/130874495/02fa656fe654f50.pdfIn PDF document text
    • http://awbphotography.ca/uploads/1/3/0/4/130435658/kewosu_suduzakevelaro.pdfIn PDF document text
    • http://quenchlandscapes.com/uploads/1/3/0/8/130874591/f9b218.pdfIn PDF document text
    • http://lhautomation.net/uploads/1/3/1/1/131163960/pogoniguweloxu_vekovena.pdfIn PDF document text
    • http://aristocratshairandnail.com/uploads/1/3/0/5/130588443/4110a.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB2E 8340 bytes
SHA-256: cf41331f5b1726d28529176f6276cc0f1ae22f09fb897403c32bf5a4c5912f68