Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdc9d74cab087b7a…

MALICIOUS

PDF

37.3 KB Created: 2020-06-14 15:59:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 430292d4478b3fc0311f4cc8b3f37a28 SHA-1: 902ec6b149814d6aa27af73e7102c870ecc6371f SHA-256: bdc9d74cab087b7a048699892219ed30bf9811ad56865e61b9f46640b1755e9b
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to other PDF files, indicating a link farm or SEO manipulation tactic. The document body, though heavily obfuscated, contains URLs that are part of this network. This suggests the primary goal is to drive traffic to these sites, potentially for malicious redirection or content delivery.

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://mayfairandcompany.com/uploads/1/3/0/8/130813778/130813778.html#yoga+hand+mudras+pdf PDF link annotation
    • http://monicacarrollart.com/uploads/1/3/1/4/131437538/vojakawejuraxulubot.pdfIn PDF document text
    • http://dawsongmt.org/uploads/1/3/1/4/131453226/8423533.pdfIn PDF document text
    • http://byol.xyz/uploads/1/3/0/6/130603978/c6ce32f.pdfIn PDF document text
    • http://bigheart.dk/uploads/1/3/1/3/131384128/429250.pdfIn PDF document text
    • http://_carddavs._tcp.sylviasenglishonline.org/uploads/1/3/0/5/130539642/lidifajukomov.pdfIn PDF document text
    • http://lastminute-events.be/uploads/1/3/0/2/130272877/321e607cf70.pdfIn PDF document text
    • http://staging6.tnhempfarmacy.com/uploads/1/3/0/7/130775536/togejavumameviminux.pdfIn PDF document text
    • http://diendan.giamdoc.net/uploads/1/3/0/7/130775659/fitawudipozo.pdfIn PDF document text
    • http://mail.timberfloorsdirect.co.nz/uploads/1/3/0/6/130605331/5799591.pdfIn PDF document text
    • http://kk-star.net/uploads/1/3/0/7/130739699/5020304.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://pegizibi.files.wordpress.com/2020/06/38890375030.pdfIn PDF document text
    • https://tijizukoveb.files.wordpress.com/2020/06/53250631682.pdfIn PDF document text
    • https://vikotefo.files.wordpress.com/2020/06/rivifabudofuwegitawalem.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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6766 10084 bytes
SHA-256: 8fdea97b3df84b13483532105e2398d4846c53dfaedef5b74d6084f22b2f9d62