Malicious PDF — malware analysis report

Static analysis result for SHA-256 0950a41b02343ead…

MALICIOUS

PDF

41.3 KB Created: 2020-04-05 14:10:48 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e6f48c4ccd579b1901beded1ed7666da SHA-1: 854cb1e41440d53b8c55c42302febb2b03fced7b SHA-256: 0950a41b02343eadce8eb936b6d3d730572479ec8089e7e8ab0ad657c17a0ed5
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF document contains a large number of external links, identified as a link farm, suggesting an attempt to direct users to malicious content. The embedded URLs, such as http://revolutionaryoils.com/uploads/1/3/1/4/131453081/131453081.html#pathoma+2017+video+download, likely serve as entry points for further compromise. The ML classifier strongly indicated maliciousness, supporting the assessment of a phishing or content-luring attack.

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://revolutionaryoils.com/uploads/1/3/1/4/131453081/131453081.html#pathoma+2017+video+download
    • http://mybookwish.org/uploads/1/3/1/4/131453530/3103551.pdf
    • http://casalunacreative.com/uploads/1/3/1/3/131379070/f723c8a2aa55e7b.pdf
    • http://nepagazette.com/uploads/1/3/0/5/130588336/merix.pdf
    • http://michelleblanchette.org/uploads/1/3/0/4/130436222/kikupi_jodifupapil_bolotawaw.pdf
    • http://levfamily.org/uploads/1/3/0/7/130739043/tagujox.pdf
    • http://rodrives.com/uploads/1/3/0/6/130621020/vozajeraruz.pdf
    • http://mcranch-tx.com/uploads/1/3/0/7/130776070/2328989.pdf
    • http://bombs2brushes.com/uploads/1/3/0/9/130969608/3072259.pdf
    • http://mssugarscloset.com/uploads/1/3/1/3/131379830/dulidororimolivareti.pdf
    • http://nailsbyjaz.com/uploads/1/3/0/2/130270899/dojepawekatunu.pdf
    • http://masteringmagic.net/uploads/1/3/0/8/130814851/lisitasuxuge.pdf
    • http://ghettomaderecords.com/uploads/1/3/0/7/130775297/6955101.pdf
    • http://drewsdraincleaning.com/uploads/1/3/0/6/130621432/e24e716ccc05261.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ef3.bin
9cf408c51961d9a65a673fcab31957cdb219fcf7e9515cf1842305b5933f74d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF3 8440 bytes
font_01_sfnt_off00008f7b.bin
83459e82cebe561b9e65dda6a09953c9e35f75e5df0fa62a624e1833cc5b8086		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F7B 1708 bytes

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