Malicious PDF — malware analysis report

Static analysis result for SHA-256 b37e008334e4282c…

MALICIOUS

PDF

42.8 KB Created: 2020-03-30 14:00:15 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 8463d2441579b74ba5511fde7af414cb SHA-1: 4f0b3275ee1e97e7761316618b36aa53f0683ca6 SHA-256: b37e008334e4282cc529947675cc68bc3aadb91445ba0598ebc9f05c1e4b5352
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body text, while partially corrupted, includes a title related to economic growth strategies and references the wkhtmltopdf tool, suggesting a deceptive lure. The primary intent appears to be directing users to a vast network of linked PDF files, likely for SEO manipulation or to host malicious payloads.

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://adsl-63-204-18-21.benefitplans.org/uploads/1/3/1/4/131453559/131453559.html#estrategias+de+crecimiento+econ%C3%B3mico+exitosas+de+otros+pa%C3%ADses PDF link annotation
    • http://cherylandzhifeng.com/uploads/1/3/1/1/131163536/9240185.pdfIn PDF document text
    • http://bradleyrobybowl.com/uploads/1/3/0/7/130776672/miburinejatukaviboxo.pdfIn PDF document text
    • http://israelweddingband.com/uploads/1/3/1/1/131163991/2928604.pdfIn PDF document text
    • http://travellight.online/uploads/1/3/0/6/130640006/mepezudikexa.pdfIn PDF document text
    • http://ardmorevetservices.com/uploads/1/3/0/3/130312961/tokupuwegamivokorid.pdfIn PDF document text
    • http://fourchedesign.net/uploads/1/3/0/2/130287278/3350862.pdfIn PDF document text
    • http://c4studioscornwall.com/uploads/1/3/0/2/130287419/nupisemojakumesaja.pdfIn PDF document text
    • http://therewilder.com/uploads/1/3/0/6/130604692/femedan_xolekow_wuzino_giweginonilijed.pdfIn PDF document text
    • http://capturingportsmouth.com/uploads/1/3/1/4/131406722/vugazogoz-kidexidabawelun.pdfIn PDF document text
    • http://paqospath.us/uploads/1/3/0/3/130313343/6687918.pdfIn PDF document text
    • http://perfectimperfectionsbyjeanne.com/uploads/1/3/0/8/130813079/420f9658a5e.pdfIn PDF document text
    • http://icdtautomotivellc.org/uploads/1/3/0/5/130588783/suverizoxitebe.pdfIn PDF document text
    • http://elizabethchandlerlondon.com/uploads/1/3/0/6/130605403/4768411.pdfIn PDF document text
    • http://southernconcreteandshellllc.com/uploads/1/3/0/2/130289779/2761844.pdfIn PDF document text
    • http://anic.ca/uploads/1/3/0/6/130605442/192171de00.pdfIn PDF document text
    • http://bakingarsenal.com/uploads/1/3/0/7/130739285/bifugozijeveva.pdfIn PDF document text
    • http://twindragon.org/uploads/1/3/0/3/130312972/medirebafatelit.pdfIn PDF document text
    • http://acarroll-wallace.com/uploads/1/3/1/3/131378972/5881512.pdfIn PDF document text
    • http://jordanjacksonsound.com/uploads/1/3/0/7/130739772/c5e927dfff04152.pdfIn PDF document text
    • http://kickstartchildrensbooks.com/uploads/1/3/0/8/130813306/belereradugal-gizetezo-dovabibubu-babujomotugaj.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 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_off000079c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79C9 8988 bytes
SHA-256: ec2b602116822175d209e96499439155ce89999298fe5b78c0eac6f6a4506b89

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