Malicious PDF — malware analysis report

Static analysis result for SHA-256 853ef6471020b3e9…

MALICIOUS

PDF

42.7 KB Created: 2020-06-04 02:27:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b0864562587884274dca1ebfa8545e48 SHA-1: f44a63367641fe2f4d578656456d1fad6d85f1da SHA-256: 853ef6471020b3e95d8597210a14f876c382c125d61a49a3727d4dfec15c6549
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of external links, many of which point to PDF files hosted on various domains, suggesting a link farm or SEO poisoning tactic. One prominent URL, http://74-123-73-62.mgwnet.com/uploads/1/3/0/5/130550743/130550743.html#free+picasa+3+download, indicates a lure for free software downloads. The ML classifier strongly flagged this PDF as malicious, supporting the interpretation of a malicious intent behind the link farm and download lure.

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://74-123-73-62.mgwnet.com/uploads/1/3/0/5/130550743/130550743.html#free+picasa+3+download PDF link annotation
    • http://caddiesoncourse.com/uploads/1/3/0/9/130969539/mimimuxi.pdfIn PDF document text
    • http://cestariyarn.com/uploads/1/3/0/5/130539820/8856829.pdfIn PDF document text
    • http://dns.wpea.org/uploads/1/3/0/9/130969552/236249.pdfIn PDF document text
    • http://silvanagoldemberg.com/uploads/1/3/0/3/130312972/746015.pdfIn PDF document text
    • http://beatsbytheharv.com/uploads/1/3/0/6/130639698/49294.pdfIn PDF document text
    • http://biancagentry.com/uploads/1/3/0/4/130489833/lejezun.pdfIn PDF document text
    • http://juneauquickcare.com/uploads/1/3/0/8/130874239/xepapexakenokakame.pdfIn PDF document text
    • http://74-123-73-62.mgwnet.com/uploads/1/3/0/5/130550743/terms.htmlIn PDF document text
    • http://74-123-73-62.mgwnet.com/uploads/1/3/0/5/130550743/dmca.htmlIn PDF document text
    • http://74-123-73-62.mgwnet.com/uploads/1/3/0/5/130550743/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://repuvalo.files.wordpress.com/2020/06/fazixojorazuwuxuxi.pdfIn PDF document text
    • https://kuziwugajeko.files.wordpress.com/2020/06/gugakewi.pdfIn PDF document text
    • https://kujigeder.files.wordpress.com/2020/06/tiwobab.pdfIn PDF document text
    • https://ruxejetufe.files.wordpress.com/2020/06/buwome.pdfIn PDF document text
    • https://zemijedo.files.wordpress.com/2020/06/vozukijigaradizoro.pdfIn PDF document text
    • https://sebogoveb.files.wordpress.com/2020/06/11407355193.pdfIn PDF document text
    • https://luropatasoz.files.wordpress.com/2020/06/76711745650.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
    • http://scripts.sil.org/OFLIn 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_off00006e88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E88 20504 bytes
SHA-256: 9923d301b3f0cb0126a5f6d208e09d9e10fe986a775dc5a91eafced989db5e27

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