Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ac6bab959d6e0c8…

MALICIOUS

PDF

49.0 KB Created: 2020-06-11 23:16:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c6c7626866d26af55c8e0bbe5de2be9 SHA-1: 5cc1a1c281eee3f7793b95cb92cfb53b76d6974e SHA-256: 6ac6bab959d6e0c8b35a00b94a6e14081044aba95c853871d59800aa94620252
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicates maliciousness. The document body contains a reference to a 'makeup tutorial' which is likely a lure to disguise the malicious intent of directing users to numerous external PDF files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://doubleedgedswordministry.com/uploads/1/3/1/3/131383665/131383665.html#sarah+harding+makeup+tutorial
    • http://spivakhudsonvalleyrealestate.com/uploads/1/3/1/1/131164246/5211266.pdf
    • http://hostmaster.realisa.nl/uploads/1/3/0/8/130814241/zezinovufixu.pdf
    • http://foundgeneration.net/uploads/1/3/1/8/131871501/gativomodatasiluraka.pdf
    • http://mx.elgaby.com/uploads/1/3/1/6/131636707/f2496bb978.pdf
    • http://74-123-73-221.mgwnet.com/uploads/1/3/1/6/131636833/vuromifob_nigajomoxune_gifubasufu_xuwenufulorekil.pdf
    • http://careeringaming.com/uploads/1/3/0/3/130313345/zumoketasezova_nasumit_xigorugema_viluwafotevaxeg.pdf
    • http://lucykirchner.com/uploads/1/3/0/5/130545128/9992824.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://verisemi.files.wordpress.com/2020/06/63599541418.pdf
    • https://vufekodumuga.files.wordpress.com/2020/06/pewudilemesoguk.pdf
    • https://nabelugameka.files.wordpress.com/2020/06/likaxajixijenowediwes.pdf
    • https://korovite.files.wordpress.com/2020/06/81829629423.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009144.bin
6855985786ab27f8e6dae5b1048a0cfd8025b95d87b69a2b1c1417068f8024f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9144 10988 bytes

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