Malicious PDF — malware analysis report

Static analysis result for SHA-256 60ba8f5fbf987605…

MALICIOUS

PDF

36.8 KB Created: 2020-04-25 15:52:34 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b960c2571b2fa63eae352c65745c476f SHA-1: ae722bbdad9c9af18c0e748ec88da99a050b3afd SHA-256: 60ba8f5fbf987605f6ab5a4f679b1546fb05c029df13947530d2f7a81ad217b2
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, indicating a potential link farm or redirection to malicious sites. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs further supports this assessment. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to lead users to compromised or malicious web content.

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://cfthomas.com/uploads/1/3/1/4/131482812/131482812.html#photosynthesis+and+respiration+pogil+answers
    • http://nexusnebulasaga.com/uploads/1/3/1/3/131380342/fb496c3e918cb.pdf
    • http://ma-home-inspection.com/uploads/1/3/1/1/131163920/xaxakagami-sonibode.pdf
    • http://alexbasoc-energyhealer.com/uploads/1/3/0/5/130551423/4311460.pdf
    • http://rpmanagementny.com/uploads/1/3/0/8/130814611/zudaz-xotuxopuj-nagoxarox.pdf
    • http://thatsclass.com/uploads/1/3/1/3/131398102/tifufun-fobotuvirese.pdf
    • http://lrvibedanceacademy.com/uploads/1/3/0/6/130605146/4851085.pdf
    • http://truelightem.net/uploads/1/3/0/5/130551623/bakuzaj.pdf
    • http://noblevirtues.org/uploads/1/3/0/5/130588905/gukagixasupomug.pdf
    • http://foxlanepec.com/uploads/1/3/0/6/130620594/bedaxuneroviwo_tozulare_tugonaku.pdf
    • http://mta-sts.mail.nightsofberlin.de/uploads/1/3/1/4/131407082/2357807.pdf
    • http://sjsbeacon.com/uploads/1/3/0/7/130740092/zozibijosirubu.pdf
    • http://bestbismarckduiattorney.com/uploads/1/3/0/6/130604986/9341987.pdf
    • http://www.pdfread
    • https://instruction2.msfta.worksheeto.com/uploads/3/0/7/1/30714221/cell_energy_study_guide
    • http://freshbiology
    • https://www..weebly
    • http://www.What
    • https://cpb-us-e1.net/cms/lib05/MI01000971/Centricity/Domain/2027/Answer%20Key.howellschools.In
    • https://nickrath
    • https://mi01000971
    • https://coachandersonblog..net
    • http://bufordsbiobuzz
    • http://www.com/oneale/14%20photosynthesis%20and%20respiration%20s
    • 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_off000066c5.bin
0f1349ae5b9716a5d13c991e4f272494b31c83e7559bbb7d52d8be5aef92a033		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66C5 8416 bytes

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