Malicious PDF — malware analysis report

Static analysis result for SHA-256 184ef8386f39ca45…

MALICIOUS

PDF

40.3 KB Created: 2020-05-23 05:25:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 92ab8dc8a545180fc799999d36c6b58a SHA-1: f2db50289cfdfe405e31fbe7ab0acd99b596f1d6 SHA-256: 184ef8386f39ca45ea933334923648fc3e2309823ab863c45eb636f5591f6408
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also flagged this PDF as malicious with high confidence. The embedded document body text, though partially corrupted, contains URLs that are part of this link farm, suggesting the document's primary purpose is to redirect users to a network of external resources.

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://ultralateral.ca/uploads/1/3/0/6/130640223/130640223.html#david+viscott+a+linguagem+dos+sentim PDF link annotation
    • http://hostmaster.thewoolproject.com/uploads/1/3/0/7/130775247/124e191edb8.pdfIn PDF document text
    • http://callumsstag.com/uploads/1/3/0/2/130272921/7240043.pdfIn PDF document text
    • http://divinehealinghands.studio/uploads/1/3/0/2/130287923/5886138.pdfIn PDF document text
    • http://thebeautyboxguiseley.com/uploads/1/3/0/7/130775729/6153680ea2da.pdfIn PDF document text
    • http://ttrgi.org/uploads/1/3/0/3/130313411/ludusedexafe.pdfIn PDF document text
    • http://lakbay2020.com/uploads/1/3/0/3/130379777/kovulazesune_lojubakusur_zefejexuk.pdfIn PDF document text
    • http://allisemy.com/uploads/1/3/1/4/131455024/rurafu_nefotubidako_fevakepulum_zesivarimina.pdfIn PDF document text
    • http://urgenticaretexas.com/uploads/1/3/0/4/130489275/domugu-tunexonavafenif-veguselixepa.pdfIn PDF document text
    • http://patriotnrr.com/uploads/1/3/0/7/130775116/zolof.pdfIn PDF document text
    • http://geointerio.com/uploads/1/3/1/4/131453934/koguz_rumeko.pdfIn PDF document text
    • http://uneedem.com/uploads/1/3/0/7/130775729/lubijagu.pdfIn PDF document text
    • http://tentenbus.net/uploads/1/3/0/8/130813957/c5e971d38c43.pdfIn PDF document text
    • http://nsolc.com/uploads/1/3/0/6/130604264/3643799.pdfIn PDF document text
    • http://627.heathermcclarriephotography.com/uploads/1/3/1/0/131070165/belufuxemefe_polisonolemek.pdfIn PDF document text
    • http://ahlincattle.com/uploads/1/3/0/8/130815115/4590173.pdfIn PDF document text
    • http://50klawn.net/uploads/1/3/0/6/130639263/kojofosiva.pdfIn PDF document text
    • http://aminomassage.com/uploads/1/3/1/3/131381046/86cda247e51da.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 8

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_off00006c8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C8E 12704 bytes
SHA-256: c3c5f15eb00bc9876b8e46c8275fcb4055bb60588e256cfd2e6e81a00ec1c8ec

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