Malicious PDF — malware analysis report

Static analysis result for SHA-256 966a59f3a6bfad85…

MALICIOUS

PDF

45.1 KB Created: 2020-04-08 01:55:22 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ee67ab36553d010c2da399b7f1dc163a SHA-1: 92b0948b202d9e1142d627ddd5c1fdccfa3b8c4f SHA-256: 966a59f3a6bfad85247da6a1584ed93dde22f9274310097a92330c62ccc2b35f
94 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, though partially corrupted, also contains embedded URLs. These links likely serve to direct users to malicious content or to manipulate search engine rankings. The ML classifier strongly indicated maliciousness.

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://sweetestdreams.org/uploads/1/3/0/7/130776649/130776649.html#onkyo+dp+x1a+review
    • http://ichafoundation.com/uploads/1/3/0/3/130323213/fogaberivesi.pdf
    • http://emma-brierley.com/uploads/1/3/0/6/130620972/pufanibavawe_dovun.pdf
    • http://colormefitmd.com/uploads/1/3/0/5/130551187/nijalitiwifoxeb.pdf
    • http://bridgeportcommercepark.com/uploads/1/3/0/7/130739653/fafolakemobugusev.pdf
    • http://rltboutiquetravel.com/uploads/1/3/0/7/130775221/nagimol.pdf
    • http://officiallydelore.com/uploads/1/3/1/3/131384135/82f48494a7312cc.pdf
    • http://learningtreeenterprise.com/uploads/1/3/0/9/130969404/vizatijixoxonubupawi.pdf
    • http://lachangemakers.org/uploads/1/3/0/4/130488920/dujafitina.pdf
    • http://treeservicehowellmi.com/uploads/1/3/0/4/130489075/fa7fbfef9b20088.pdf
    • http://goldendaleobservatory.org/uploads/1/3/1/4/131409035/3075667.pdf
    • http://socalecoblasting.com/uploads/1/3/0/9/130969465/43322a7c5536e9.pdf
    • http://townofgettysburg.com/uploads/1/3/0/8/130874269/tipumubaju.pdf
    • http://arsfabricandi.com/uploads/1/3/0/7/130738803/e7980bd6.pdf
    • http://curated-experiences.com/uploads/1/3/1/0/131069750/5118649.pdf
    • http://jllcelebration.com/uploads/1/3/0/8/130815137/mitetasinisen.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008722.bin
4677d0399f5152847b07f5cf030a4fb8280d532b08e4316550dba3b67918f7c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8722 8508 bytes

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