Malicious PDF — malware analysis report

Static analysis result for SHA-256 64f2b41908fd779b…

MALICIOUS

PDF

30.2 KB Created: 2020-04-17 16:07:07 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a48881b6c113820e27398424482603b7 SHA-1: 4e6fd842d5569cd2aef4c647fcc97eb68f966ff3 SHA-256: 64f2b41908fd779b8eab1c7b9ff399575526a7f4f98b302d80eb74af6b44c931
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. These links point to various domains, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine the exact payload or user interaction intended beyond visiting the linked URLs.

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://mumeditation.com/uploads/1/3/0/2/130288720/130288720.html#bootstrap+4+form+datepicker
    • http://yourketomentor.com/uploads/1/3/0/6/130620940/359790b7.pdf
    • http://nesherco.com/uploads/1/3/0/4/130476248/kolaju.pdf
    • http://shrunkies.com/uploads/1/3/1/4/131407369/legamaximuze-galex-tilizate.pdf
    • http://fabiot.website/uploads/1/3/0/5/130543995/sesodimoda.pdf
    • http://precisionsignsllc.com/uploads/1/3/0/5/130551342/973a08976.pdf
    • http://alliedphysics.net/uploads/1/3/0/3/130323674/wosajubitapol_lifusifa.pdf
    • http://canadianvalleypediatrics.net/uploads/1/3/0/5/130539297/mubaworenubodomutu.pdf
    • http://fourpointswellnessforlife.com/uploads/1/3/0/2/130272482/lopobiled.pdf
    • http://livingwaterupc.org/uploads/1/3/1/3/131384718/jumusesuj_zefeposow_dukibip_govuladif.pdf
    • http://mwmorriscreative.com/uploads/1/3/1/6/131606480/nivesikopojimimivoti.pdf
    • http://prdconstrucoes.net/uploads/1/3/1/4/131483603/236125.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_off00004edd.bin
80fe5fb9e4103b5e8ced9fc808102cb1994ce926ae8cb677ab9eb1d577baae7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EDD 7664 bytes

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