Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce380421306536a0…

MALICIOUS

PDF

36.3 KB Created: 2020-03-14 17:44:08 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-04
MD5: 74ca1ff40818fe2f3b45b6ca066d2b39 SHA-1: e5dc8ae4e723a429fa7d72fa7e22e68b92beb306 SHA-256: ce380421306536a0d09a4ec91e5edb830ffe874ee481325ac2539d8a6203a73b
96 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The document body, though partially corrupted, suggests a lure related to 'antibiotic use in primary care'. The heuristic 'PDF_SEO_LINK_FARM' strongly indicates the intent is to create a link farm. No scripts were extracted from this sample.

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://taojinyingkaihushouxuanhailifang.br3h.com/uploads/1/3/0/7/130740175/130740175.html#guidelines+for+antibiotic+use+in+primary+care PDF link annotation
    • http://handymanmiddlesbrough.co.uk/uploads/1/3/0/7/130775334/8531640.pdfIn PDF document text
    • http://vancouverfreediving.net/uploads/1/3/0/4/130483959/kanawowexas_mulixaz_nifuvijo.pdfIn PDF document text
    • http://giveandgetrewards.org/uploads/1/3/0/4/130483817/7184bee3fee.pdfIn PDF document text
    • http://cyber-plus.net/uploads/1/3/0/3/130323253/kofubewovo_vukifinogolop_lurikadud_xebibapagunu.pdfIn PDF document text
    • http://engagingpeace.net/uploads/1/3/0/6/130620936/2250689.pdfIn PDF document text
    • http://eskdalefalconry.co.uk/uploads/1/3/0/7/130775752/6183267.pdfIn PDF document text
    • http://abigailforjustice.us/uploads/1/3/0/5/130588169/427178.pdfIn PDF document text
    • http://saucedpizza.com/uploads/1/3/0/5/130541140/75583b.pdfIn PDF document text
    • http://ardmorevetservices.com/uploads/1/3/0/6/130603698/pivovomukasaw_tipun.pdfIn PDF document text
    • http://familyrvadventures.com/uploads/1/3/0/7/130739423/sinatofotaz.pdfIn PDF document text
    • http://coachsmith.net/uploads/1/3/0/4/130435925/5005783.pdfIn PDF document text
    • http://ohayocleaning.com/uploads/1/3/0/6/130620840/5541007.pdfIn PDF document text
    • http://newzealandlgbtiaward.com/uploads/1/3/0/2/130272853/mefev_vijeg_sazodofimaf.pdfIn PDF document text
    • http://www.maximuseneca.com/uploads/1/3/0/5/130589097/4938554.pdfIn PDF document text
    • http://healthypins365.club/uploads/1/3/0/8/130813301/fewibamajitib.pdfIn PDF document text
    • http://lehmers.viewourbenefits.com/uploads/1/3/0/2/130271016/4860114.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6629 7624 bytes
SHA-256: 247fb1dd0fb2734b614faaec8e3953dbd48b4ec9bd7fa5a35e1bdd328bb68ed8

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