Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a7d877f9ba4986e…

MALICIOUS

PDF

41.9 KB Created: 2020-06-15 07:28:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: bc3427d584779fed7708b95207a281ee SHA-1: 6a49f431330cf778bdada0d585e569d5f92e7b0f SHA-256: 9a7d877f9ba4986e894b4a7dfc921bf0c48dc392e78d7adbf60e64923b47f1ba
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The primary purpose appears to be directing users to a network of websites, likely for SEO spam or to host further malicious content.

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://sedanthegodofsound.com/uploads/1/3/0/7/130775513/130775513.html#differentiation+of+implicit+functions+pdf PDF link annotation
    • http://mirafaith.com/uploads/1/3/1/4/131454656/sabesadikunuwib-lunoduxete.pdfIn PDF document text
    • http://atelierdelysecoiffure.com/uploads/1/3/1/4/131406390/zalupalowej_sitisovedajuw.pdfIn PDF document text
    • http://webmail.ccalliance.com/uploads/1/3/0/7/130739664/rataxazemofuzed_kudulidix_laxoxomavaxaku.pdfIn PDF document text
    • http://bubblingbubs.com.au/uploads/1/3/0/5/130588716/8dc6f0e0bb.pdfIn PDF document text
    • http://ivysbedandbreakfast.com/uploads/1/3/0/6/130603874/4717960.pdfIn PDF document text
    • http://sharlaparsonsrealestate.com/uploads/1/3/0/6/130639444/fotevutebufitajodid.pdfIn PDF document text
    • http://dawahtools.com/uploads/1/3/0/5/130589002/luxiraxinuxikapo.pdfIn PDF document text
    • http://vinestreetbiblechurch.com/uploads/1/3/1/4/131452794/vifewakepolodunotel.pdfIn PDF document text
    • http://office.123diewerbung.com/uploads/1/3/1/4/131412426/rijosalubozawir-farofelawefupij.pdfIn PDF document text
    • http://74-123-78-212.mgwnet.com/uploads/1/3/0/5/130539373/zepazakutuzitum.pdfIn PDF document text
    • http://74-123-73-172.mgwnet.com/uploads/1/3/1/0/131070488/1691900.pdfIn PDF document text
    • http://minnowmanmedia.com/uploads/1/3/0/2/130289541/kipabigopagolusofipi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://nigadimuzifo.files.wordpress.com/2020/06/50238411126.pdfIn PDF document text
    • https://muforopolul.files.wordpress.com/2020/06/netuxopuzepage.pdfIn PDF document text
    • https://bokekesu.files.wordpress.com/2020/06/fupuxurolobubenal.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000611e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x611E 10868 bytes
SHA-256: 1f99cb430e148b7fb23a651912e65dc25bd00c70f4a74716674cfb5d0176070b
font_01_sfnt_off0000869c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x869C 16080 bytes
SHA-256: c0982807324681c2194e80f3f637ca3700f5bf2c32718b44bdc390b4bb628087

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