Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ba4979dd5f62810…

MALICIOUS

PDF

35.7 KB Created: 2020-03-27 02:17:09 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0f674155b9676868e5ba6ce64de8907c SHA-1: 15f55643c99b3cad913ea8075f551ee8b7503518 SHA-256: 7ba4979dd5f62810d088d4ea194d2f9d961d5c5603f6b81a58ab9dc482a51546
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links to various domains, indicating a link farm or distribution mechanism. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves directing users to a multitude of external PDF files, likely to distribute malware or for SEO manipulation.

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://bhsfineartsboosters.org/uploads/1/3/1/0/131070867/131070867.html#adobe+character+animator+animation
    • http://db.quantum5280.com/uploads/1/3/0/3/130323182/774914e4da90e2.pdf
    • http://www.consciousnesscreatives.designpreviewer.com/uploads/1/3/0/2/130270923/sinefamopejozu-vililalit-kedetepazem-kopakanofo.pdf
    • http://orquestacastillayleon.net/uploads/1/3/0/6/130604458/fbb8364a5.pdf
    • http://augustuscaesaromewc.com/uploads/1/3/0/2/130288762/b5ed4.pdf
    • http://mangumcourtyards.com/uploads/1/3/0/4/130483591/621583.pdf
    • http://lordpulex.com/uploads/1/3/0/5/130551015/ladobesisekud_junux_dixijob_dututijibukawif.pdf
    • http://360geeseservices.com/uploads/1/3/0/7/130738894/5e9bddbd286360c.pdf
    • http://www.chubbiebunniesbows.com/uploads/1/3/0/7/130775630/d6e5c62e.pdf
    • http://thamaddhatta.com/uploads/1/3/0/6/130621432/renebujubumiwi_tegelefojex.pdf
    • http://mossiepawspetmassage.com/uploads/1/3/1/3/131384618/vemomos-zejevurokad-lebavomiruvipe.pdf
    • http://zstitchdesigns.com/uploads/1/3/0/5/130540937/lavibumazu.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_off0000647a.bin
a557dfff6d011f421341587704c1212d0bcc45d058bbe66ee29011946d92323b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x647A 7488 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.