Malicious PDF — malware analysis report

Static analysis result for SHA-256 2070158476d24ed0…

MALICIOUS

PDF

38.3 KB Created: 2020-04-05 16:30:48 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2603481cf7ede7cf33c6ecf02d5980a1 SHA-1: 549e5aa8e0b55fd06d87f895a810f0b500c9b33b SHA-256: 2070158476d24ed002ae6bc463074d40bfc5fa30642aeb261bf10ecee3a9adb7
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 embedded document body text, though partially corrupted, contains a URL that also points to an external HTML file. These links likely serve to redirect users to malicious content or to manipulate search engine results. 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://imeyecatching.com/uploads/1/3/0/2/130288557/130288557.html#nomenclatura+de+oxido+metalico+y+no+metalico
    • http://elpc.info/uploads/1/3/0/2/130270903/4098010.pdf
    • http://curriculumdevelopmentunit.com/uploads/1/3/0/7/130740618/subejotila.pdf
    • http://darleyps.com/uploads/1/3/0/7/130775085/vonuxonukulakexurapu.pdf
    • http://genn3ra.com/uploads/1/3/1/1/131164435/5850716.pdf
    • http://drmaureenpierce.com/uploads/1/3/0/6/130621418/bf9603225dd50.pdf
    • http://www.mikephelpslaw.com/uploads/1/3/0/9/130969527/tixejef-bomizifogagi-wodabupikusoj-niwoduxo.pdf
    • http://eveetsoins.com/uploads/1/3/1/3/131380429/1797dde7a69686e.pdf
    • http://juddjacob.com/uploads/1/3/0/3/130323186/bamezogita_febebolewo.pdf
    • http://newborntaxidermy.com/uploads/1/3/0/5/130588515/pamidim.pdf
    • http://chuymichel.com/uploads/1/3/0/2/130289763/8e366cebf0.pdf
    • http://quitosltd.com/uploads/1/3/0/9/130969220/f774456f121.pdf
    • http://keyofcworld.com/uploads/1/3/1/0/131070030/5623145.pdf
    • http://imacdl.com/uploads/1/3/1/4/131410870/lajasopikub_peboxifagilu_vipovasewobov.pdf
    • http://seazonsonline.com/uploads/1/3/0/5/130543466/8070140.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_off00006c6c.bin
e0d1b8c4ca198d6bfc71205476e46d53231e794daa611c9f2218afbe09de2ad6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C6C 8112 bytes

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