Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e1ea2782d36312d…

MALICIOUS

PDF

34.8 KB Created: 2020-04-07 15:04:08 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: be7ce0b2d880fe26e29ecaa830c9393f SHA-1: 14fa6b8fd0fdfc3f1f4ffff9af31b4b68061a9a8 SHA-256: 6e1ea2782d36312d97e9e3d2451719d7490a6357c5dc2c0c59d557b16133c4c7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to other PDF files, indicating a link farm or SEO manipulation tactic. The document body, though heavily obfuscated, contains URLs that are also present in the extracted URL list. The ML classifier strongly flagged this PDF as malicious, suggesting it is part of a campaign to drive traffic to potentially harmful sites.

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://jessicalgervaisbooks.com/uploads/1/3/1/3/131379312/131379312.html#algebra+2+quadratic+equations+worksheet+answers
    • http://mirandalyncushman.com/uploads/1/3/1/1/131164386/rupogatu.pdf
    • http://freedomofheart.org/uploads/1/3/0/5/130588515/bcabfb2.pdf
    • http://wisconsinsurveyor.com/uploads/1/3/0/2/130271111/gapogarelo.pdf
    • http://pictimagery.com/uploads/1/3/1/4/131437622/worefiwugoxav.pdf
    • http://terroirs-du-monde-education.com/uploads/1/3/1/1/131163828/1338140.pdf
    • http://lokuelos.com/uploads/1/3/0/6/130639916/2464646.pdf
    • http://dakotaneurology.com/uploads/1/3/0/9/130969940/1663731.pdf
    • http://vind-t.com/uploads/1/3/0/4/130483769/ae977e62622c62.pdf
    • http://jeremihagelin.com/uploads/1/3/1/3/131398359/8f97fa.pdf
    • http://samanthaboyledesign.com/uploads/1/3/0/7/130740625/951d17dce.pdf
    • http://proactivesolutionsservices.com/uploads/1/3/0/2/130272585/jabexafepinuma_zodege_netabodaza_mijavazi.pdf
    • http://o-m-immobilien.de/uploads/1/3/0/8/130873951/jewamugelafov_sagazulekaniba.pdf
    • http://andrichins.com/uploads/1/3/0/4/130477293/duveju.pdf
    • http://cell-wellness.com/uploads/1/3/0/6/130639776/xojaxoka_bifir.pdf
    • http://resilientscholars.com/uploads/1/3/0/9/130969483/xupekav.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_off00006030.bin
2bfc6b78ec8eed8b65890ca3597908efb303026a9411373fd79c7f636a930e22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6030 7644 bytes

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