Malicious PDF — malware analysis report

Static analysis result for SHA-256 0090e2b6d86a5b79…

MALICIOUS

PDF

42.3 KB Created: 2020-03-29 06:49:26 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c1ca938504a02a7e763c2e650789fe21 SHA-1: 56bb263c6661863b110fa5f3d065e531a80bddd4 SHA-256: 0090e2b6d86a5b792532f2d941e4fe031be85a15c73cdce603d8731136d37ac3
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 primary external URI points to 'http://iweargreatness.com/uploads/1/3/1/4/131438876/131438876.html#que+unidad+de+medida+se+utiliza+para+registrar+la+temperatura'. This suggests a tactic to drive traffic to numerous sites, potentially for SEO manipulation or to host further malicious content. No scripts were extracted from this sample.

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://iweargreatness.com/uploads/1/3/1/4/131438876/131438876.html#que+unidad+de+medida+se+utiliza+para+registrar+la+temperatura
    • http://peaceontheprairie.com/uploads/1/3/0/7/130776083/30ab6faa.pdf
    • http://adgermanwarehouse.com/uploads/1/3/0/5/130589386/dikenadawafa.pdf
    • http://blackriverkayaking.com/uploads/1/3/1/3/131383478/5392074.pdf
    • http://howtobbg.com/uploads/1/3/1/1/131164164/3562857.pdf
    • http://casa-yinhang.com/uploads/1/3/0/4/130435821/1495421.pdf
    • http://rxtraining.ca/uploads/1/3/0/7/130738712/zoledevadamij.pdf
    • http://dunmorestates.com/uploads/1/3/0/3/130379429/wemupivudimepuzu.pdf
    • http://webdisk.galesburgrescuemission.org/uploads/1/3/0/4/130483670/8ae25ca901.pdf
    • http://brownsugargreetingcards.com/uploads/1/3/0/8/130814104/612446.pdf
    • http://visionarylane.com/uploads/1/3/0/5/130540033/cd739d4.pdf
    • http://hostmaster.jyefinancial.com/uploads/1/3/0/4/130489175/c154b6b1d.pdf
    • http://brentshirleyband.com/uploads/1/3/0/5/130551621/7717802.pdf
    • http://essentialmatters.com/uploads/1/3/0/6/130621552/3a53c55af958510.pdf
    • http://mobilstry.com/uploads/1/3/0/6/130639971/6512720.pdf
    • http://budz.link/uploads/1/3/0/9/130969795/dotewaremopipi_pamatuzoteka_xavuvigu_bavovaraxokev.pdf
    • http://staceyshairandbeauty.com/uploads/1/3/0/6/130605312/nizuliparoxos-lupapunidus-difidat-zilix.pdf
    • http://moldyold.com/uploads/1/3/0/2/130289581/padejizesijeb-vululigar-sonaputibuwetov.pdf
    • http://natashadoulabirthmarks.com/uploads/1/3/0/2/130289371/5593342.pdf
    • http://303stonebrokers.com/uploads/1/3/0/6/130621630/gesunukemotos_sugofipofoboxir_benanon_jipivupa.pdf
    • http://openairadventurecare.com/uploads/1/3/0/6/130620847/576039c2d1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070b0.bin
2386af7e41d80554453a9f6f7d8955872ffcaba0cbd903d3885d6302b6cc0ba1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70B0 8776 bytes
font_01_sfnt_off000090f0.bin
9f5082701ede3b34412025578f3613d16372f7e661c8785cd8d7b7f4cdd3c0ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90F0 2800 bytes

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