Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8c05879d014d9c6…

MALICIOUS

PDF

48.3 KB Created: 2020-06-16 07:16:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: 6102b1bc7d95a31221b1516587b30d2a SHA-1: c271446a87f14018e68cb445505842dfcceb8b0f SHA-256: d8c05879d014d9c671588743c451fe9b023decdbacb4ff4e43cc718de8b239a9
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body text is heavily obfuscated but contains references to URLs, suggesting a link farm or SEO manipulation tactic. The primary purpose appears to be directing users to a network of websites, potentially for malicious redirection or content delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://byt5a.bpmtc.com/uploads/1/3/2/6/132682990/132682990.html#couple+photography+poses+pdf PDF link annotation
    • http://tylerdecorhaven.com/uploads/1/3/0/6/130639905/8094437.pdfIn PDF document text
    • http://lowlogos.com/uploads/1/3/1/4/131437061/rafetovipozozo_zalezadire_komilogukela_mipavid.pdfIn PDF document text
    • http://levartdesign.com/uploads/1/3/0/2/130291712/kumug-pesakadax.pdfIn PDF document text
    • http://jtvogelllc.com/uploads/1/3/1/3/131379389/4de6da.pdfIn PDF document text
    • http://beerup.us/uploads/1/3/1/0/131071166/kiwoxebatefezib.pdfIn PDF document text
    • http://iunik.net/uploads/1/3/1/1/131164519/2517688.pdfIn PDF document text
    • http://mail.louisescott-bushell.com/uploads/1/3/0/8/130874364/2ed40770a.pdfIn PDF document text
    • http://floralpassion.us/uploads/1/3/1/8/131872285/8c5df2168de1b22.pdfIn PDF document text
    • http://odriscollassets.com/uploads/1/3/0/8/130814195/9933e0cb80478.pdfIn PDF document text
    • http://globalnationalfunding.com/uploads/1/3/0/9/130969411/2440354.pdfIn PDF document text
    • http://rimarineelectrician.com/uploads/1/3/0/6/130639997/397ca13219f47.pdfIn PDF document text
    • http://autodiscover.jessicamiyuki.com/uploads/1/3/0/9/130969018/vonirijipilimev.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000904e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x904E 10652 bytes
SHA-256: b3f28e9fda9369ca86ddedc0c3ad5c057c3d6ff13324d6177a9aa618fc465468