Malicious PDF — malware analysis report

Static analysis result for SHA-256 eae51c0ac5e8f91b…

MALICIOUS

PDF

39.5 KB Created: 2020-06-18 06:41:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-10
MD5: 4c79bebe968eb4861538ffa5095cc0e5 SHA-1: 7241c7b30453cc03556b9cb36dd47179d51f07dd SHA-256: eae51c0ac5e8f91b3bf2b19ea9e284ef767f128690ce4cab4d08f2aefed578a3
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or distribution network. The document body contains metadata related to its creation, but no direct user-facing text that would indicate a specific lure. No scripts were extracted from this sample. The primary attack pattern involves directing users to external resources, potentially for SEO manipulation or to serve 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://lindentreephotos.net/uploads/1/3/0/8/130873875/130873875.html#acca+f9+study+text+pdf PDF link annotation
    • http://thereversecowboy.com/uploads/1/3/0/5/130589320/bfd35.pdfIn PDF document text
    • http://peer-stress-survey.com/uploads/1/3/0/9/130969411/5455507.pdfIn PDF document text
    • http://blackportholdings.com/uploads/1/3/0/6/130605504/tinatimetamiluvi.pdfIn PDF document text
    • http://thebrainyblondemedia.com/uploads/1/3/0/4/130477007/noxufebosofuve.pdfIn PDF document text
    • http://latinosandamigos.org/uploads/1/3/0/2/130289292/pakuna_tirakumemomat_tagigoreve_zudopej.pdfIn PDF document text
    • http://mail.copperbeechassociates.com/uploads/1/3/0/2/130272928/zotugakeresusi_mulomigusoj_nesotonaxapuj.pdfIn PDF document text
    • http://sites.godfrey-lee.org/uploads/1/3/0/5/130589360/pusesuxe-xebaxoliz-daparopa.pdfIn PDF document text
    • http://jobsight365.com/uploads/1/3/0/5/130588452/mitader-setuzi-sukapamoduji-pewuduwegedaked.pdfIn PDF document text
    • http://alohawraps.co/uploads/1/3/1/4/131453246/duxatu-nevidefutere.pdfIn PDF document text
    • http://buildmaui.net/uploads/1/3/1/4/131453402/sinewuzokanex.pdfIn PDF document text
    • http://amycourtenay.com/uploads/1/3/0/4/130435690/tuvigasur.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

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_off00005c83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C83 4952 bytes
SHA-256: a3f1c1e1602b4fd144e55b3d0c4ba98f86504b8ac16b73279d37fb54b9664a5f
font_01_sfnt_off00006d6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D6E 10844 bytes
SHA-256: f4523845b7add8f59e6d05b3386e274f82af4b7b6c8bf0bbc50883eafd2025d8

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