Malicious PDF — malware analysis report

Static analysis result for SHA-256 b39a1dacd96a2679…

MALICIOUS

PDF

46.5 KB Created: 2020-03-10 07:30:31 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2026-05-07
MD5: 000020387ea456e1009102e8f20155ee SHA-1: 9fac7e591bddb3d16369f3b8e4a99e556a8b396b SHA-256: b39a1dacd96a2679735f7a3024695422635689cd25e30709fff0d5b4119f1996
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged by multiple heuristics as malicious, including a link farm detection and an ML classifier. The document body contains a mix of garbled text and numerous external URLs, many of which point to PDF files hosted on unrelated domains. This suggests a tactic to manipulate search engine results or to distribute a large volume of potentially malicious content through a link farm. The primary intent appears to be directing users to a network of external resources rather than delivering a direct payload from the PDF itself.

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://x0477123xstreamtravel.xsideas.com/uploads/1/3/0/6/130620973/130620973.html#pruebas+bioquimicas+de+identificacion+bacteriana PDF link annotation
    • http://creepyfuckingstalker.com/uploads/1/3/0/3/130323141/7951446.pdfIn PDF document text
    • http://lendamico.me/uploads/1/3/0/6/130604258/3335777.pdfIn PDF document text
    • http://ipselite.com/uploads/1/3/0/3/130313090/023f7c81bf.pdfIn PDF document text
    • http://ashleyjaynemeyers.com/uploads/1/3/0/7/130739530/2dc79b2e384.pdfIn PDF document text
    • http://amdlifestylemgmt.com/uploads/1/3/0/6/130621331/75eb5c2ac508.pdfIn PDF document text
    • http://theige.org/uploads/1/3/0/7/130740117/rotugibezu.pdfIn PDF document text
    • http://mysmartteacher.com/uploads/1/3/0/4/130489742/2569987.pdfIn PDF document text
    • http://www.ghosh-lab.com/uploads/1/3/0/6/130620892/lejafupapesizewexefo.pdfIn PDF document text
    • http://webdisk.valleybookstore.com/uploads/1/3/0/3/130324092/6662052.pdfIn PDF document text
    • http://mail.realsoapbydiana.com/uploads/1/3/0/2/130289467/880403fd94bbbca.pdfIn PDF document text
    • http://code-camp.ru/uploads/1/3/0/2/130289508/98e85cc4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.stixfonts.orghttp://www.micropress-inc.comAsIn PDF document text
    • http://www.stixfonts.org/user_license.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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text
    • http://scripts.sil.org/cms/scripts/page.php?site_id=nrsi&id=OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C45 9460 bytes
SHA-256: 9a83e430c9d71a6a4bd491f19bf367a492a8a239be35636eee53d900b4037051
font_01_sfnt_off00008de5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE5 2696 bytes
SHA-256: 1110447959503c75238c0f1bcdf9de7fad567fc767730a4530dcb0d3a64541bd
font_02_sfnt_off0000972f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x972F 10532 bytes
SHA-256: 043f89cdc56a6d687dbde9ca708df5d68a479f0504edd5c2f1c61766139dec50

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