Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b06f3bf84e38617…

MALICIOUS

PDF

31.3 KB Created: 2020-05-16 19:57:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 933acd7869c2a5c23e31666502f262b0 SHA-1: 7abea4f973aef9370dac032668501dba2f63ba45 SHA-256: 3b06f3bf84e38617618a2027bdbb4e3ea29bda618f1bf5acbafbbfba535d913c
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 other PDF files hosted on unrelated domains. This pattern is indicative of SEO poisoning or a link farm designed to distribute malicious content or redirect users to phishing sites. The document body contains text related to email signatures, which may be a lure. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://hofman.life/uploads/1/3/0/7/130776133/130776133.html#email+signature+template+apple+mail PDF link annotation
    • http://amedip2014.org/uploads/1/3/1/6/131607053/wapisikaropulut.pdfIn PDF document text
    • http://evreething.net/uploads/1/3/1/4/131453576/6507792.pdfIn PDF document text
    • http://gypsywomangallery.com/uploads/1/3/0/2/130288439/fivisaxoxavora_rasobonir_tubexamo.pdfIn PDF document text
    • http://raceloveandpolitics.com/uploads/1/3/0/7/130776502/fedititisulepul_sevezorate_wuxibu_garikopezu.pdfIn PDF document text
    • http://hgdisinfectors.com/uploads/1/3/1/3/131398560/7075353.pdfIn PDF document text
    • http://atlhomecleaner.com/uploads/1/3/0/4/130492963/eb2b7744d152.pdfIn PDF document text
    • http://bluestoneliveryyard.com/uploads/1/3/1/1/131164132/vasolubojewonog.pdfIn PDF document text
    • http://learn-tarot.com/uploads/1/3/1/6/131637070/safamuvu_wemakorosavulu_dodukili_jutimikomiwure.pdfIn PDF document text
    • http://tikvah.one/uploads/1/3/0/7/130739015/3051475.pdfIn PDF document text
    • http://habitfortheplanet.org/uploads/1/3/1/4/131453943/fokutiben_retidaka_titobeto.pdfIn PDF document text
    • http://countrykidsdaycarepreschool.com/uploads/1/3/0/7/130776405/xiguwuloregew.pdfIn PDF document text
    • http://thundervalleyart.com/uploads/1/3/0/3/130323232/634209.pdfIn PDF document text
    • http://marthasmaids.org/uploads/1/3/0/8/130814591/d7275c1175.pdfIn PDF document text
    • http://carenetworks.net/uploads/1/3/0/3/130313082/sekuzigigodi.pdfIn PDF document text
    • http://badasscoinrings.net/uploads/1/3/1/4/131437601/pelezukinub-vinokebisu.pdfIn PDF document text
    • http://kayhike.com/uploads/1/3/1/3/131380063/nitazipes-betinerakijozo-jarafesis-tijafojoxosefo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 4

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_off00004f1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F1C 10096 bytes
SHA-256: e697dee6f6b3e3dc25388dcec00bc54876a7619f7671b58871dd2f0af196817d

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