Malicious PDF — malware analysis report

Static analysis result for SHA-256 b12a491fa338f303…

MALICIOUS

PDF

39.9 KB Created: 2020-05-31 13:48:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3edf44c83eab6abacde4c2849131336a SHA-1: 0fb3a5a537c86e776b9981e423e6daa0f5d1da16 SHA-256: b12a491fa338f3034338ead4cd5eb2c59972de45300139478c4ec489fb5bd706
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many of which point to WordPress hosted PDFs. One specific URL, http://kvngkruz.com/uploads/1/3/0/6/130621066/130621066.html#printable+periodic+table+pdf+black+a, is flagged as malicious. The document body text, though heavily obfuscated, appears to contain references to the periodic table and the authoring application, suggesting a lure to disguise the malicious intent. The primary attack vector appears to be directing the user to a malicious external resource.

Heuristics 3

  • 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
  • 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://kvngkruz.com/uploads/1/3/0/6/130621066/130621066.html#printable+periodic+table+pdf+black+a
    • https://vajozix.files.wordpress.com/2020/05/51823585206.pdf
    • https://zozijonatoto.files.wordpress.com/2020/05/nuzukowasokemadigi.pdf
    • https://vedusax.files.wordpress.com/2020/05/48354029690.pdf
    • https://sijigakuvek.files.wordpress.com/2020/05/deramagizipuxasalowedaw.pdf
    • https://feruvef.files.wordpress.com/2020/05/74049051966.pdf
    • https://zitasigo.files.wordpress.com/2020/05/62176156560.pdf
    • https://pakuxada.files.wordpress.com/2020/05/gokekijunif.pdf
    • https://nodezebibun.files.wordpress.com/2020/05/zuwadewedugelekamerijila.pdf
    • https://jesebenoj.files.wordpress.com/2020/05/wutoro.pdf
    • https://forivugovov.files.wordpress.com/2020/05/galowetavumapirimemumuxes.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_off00007133.bin
964d9f1fbfb07c0d2987967edceae10fbe05a3d843910a4772d0ec105cf2bd9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7133 10276 bytes

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