Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b571ec7361ee1f1…

MALICIOUS

PDF

37.4 KB Created: 2020-06-08 16:06:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7d4fa1edadef355b1c917c250003a82a SHA-1: 456cbc1bf8b9abbfc155e24280f8c13cc829aef9 SHA-256: 1b571ec7361ee1f1e6ec98ac314b44f9b395fd7b475087e8fbeb790955a63956
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The embedded URLs point to various PDF files hosted on different domains, suggesting a link farm or SEO spam campaign. The document body contains garbled text and the authoring application information, but the primary malicious intent appears to be directing users to the numerous external links.

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://sycinvestments.net/uploads/1/3/0/6/130604657/130604657.html#resta+de+fracion%25C3%25A1rios+pr%25C3%25B3prios+e PDF link annotation
    • http://sdwelders.com/uploads/1/3/0/7/130738758/makabugi_pezuziwovujuw_jigewovuz_vajovalepotodat.pdfIn PDF document text
    • http://austin1991.com/uploads/1/3/0/6/130620990/1283229.pdfIn PDF document text
    • http://hostmaster.i-do-films.co.uk/uploads/1/3/1/8/131856149/pimiramu_vevolepoki_rewuz_sidoranefu.pdfIn PDF document text
    • http://webmail.allwoodsbutchers.com/uploads/1/3/0/6/130621084/metalomexosemu_pazebof_sokatafoxipis_wosafa.pdfIn PDF document text
    • http://mta-sts.jenpenasphotography.com/uploads/1/3/0/7/130738803/dudezesupulutofuko.pdfIn PDF document text
    • http://mail.tradwave.eu/uploads/1/3/0/3/130323180/4972649.pdfIn PDF document text
    • http://dakotaprairiek12nd.org/uploads/1/3/1/4/131437967/1031346.pdfIn PDF document text
    • http://host214.carmichaelnl.com/uploads/1/3/0/6/130605490/fozifag_sijotubu_zezipubaferad.pdfIn PDF document text
    • http://uwoshkoshcanvasonline.org/uploads/1/3/1/0/131071312/dulare-dosoz.pdfIn PDF document text
    • http://webdisk.stuarts2gabon.com/uploads/1/3/0/4/130476485/nipatuw.pdfIn PDF document text
    • http://en2.gavaresse.fr/uploads/1/3/1/3/131380273/tanoredilozu-zagile.pdfIn PDF document text
    • http://orshaw.com/uploads/1/3/0/7/130776553/51b4b88f8c3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://gezawutiz.files.wordpress.com/2020/06/91372914164.pdfIn PDF document text
    • https://xafexuwosuvi.files.wordpress.com/2020/06/36689252956.pdfIn PDF document text
    • https://kugigoke149047822.files.wordpress.com/2020/06/jupubaxerolidekobev.pdfIn PDF document text
    • https://pusivogaj.files.wordpress.com/2020/06/17802886702.pdfIn PDF document text
    • https://wutuximi750560644.files.wordpress.com/2020/06/zuralosevabax.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 1

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_off0000640e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x640E 10944 bytes
SHA-256: cde8ba3edaaca97f645b8d4203c8dae9dde3448833325f00142eb03cf73259dd

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