Malicious PDF — malware analysis report

Static analysis result for SHA-256 efe3208edea33dce…

MALICIOUS

PDF

34.9 KB Created: 2020-05-17 05:56:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2887fef67bd3740ed56f7dd73558d501 SHA-1: 80e3b96d3d194a017b599cb2723e0e7a17c5dfb0 SHA-256: efe3208edea33dce526faf2684e5998641acc599b7f253cbee86f5b2269c928c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document exhibits characteristics of a link farm, containing a large number of external links to other PDF files hosted across various domains. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a mass external link farm. The document body contains text related to 'activity worksheets for preschoolers pdf', suggesting a lure to disguise the malicious intent. The primary attack pattern involves directing users to these external resources, which could be used for SEO manipulation, distributing further malware, or phishing.

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://benkregel.com/uploads/1/3/0/2/130287875/130287875.html#activity+worksheets+for+preschoolers+pdf
    • http://northernwoodlandindianart.com/uploads/1/3/1/4/131406895/mugemonerutexikefa.pdf
    • http://northriverhairandnails.com/uploads/1/3/0/5/130551058/tapameguk.pdf
    • http://eatdrinkbalanced.com/uploads/1/3/0/4/130489833/nazawanedipe.pdf
    • http://smartbizmodel.com/uploads/1/3/0/3/130323703/tapomo-nugeruga-rijazen.pdf
    • http://daquebarbeque.com/uploads/1/3/0/8/130813429/gubivi.pdf
    • http://orthodontic-continuing-education.com/uploads/1/3/1/3/131398064/bidulazejuri-xamizu.pdf
    • http://launits.com/uploads/1/3/0/7/130739720/lanuziza-sigowiwuwurilum.pdf
    • http://testasqhdandl.org/uploads/1/3/1/4/131453354/8257820.pdf
    • http://lemonadecandlebar.com/uploads/1/3/1/6/131606556/5325252.pdf
    • http://oceanenergycharters.com/uploads/1/3/0/4/130476896/2789609.pdf
    • http://halfmoonfarmsllc.com/uploads/1/3/1/4/131437425/gegesen.pdf
    • http://firstalternativestherapies.com/uploads/1/3/0/4/130483886/sagazokobijiximazow.pdf
    • http://acause2travel.org/uploads/1/3/0/7/130775515/a16d1105d57.pdf
    • http://luxetveritas.info/uploads/1/3/1/8/131857334/6e76dc598.pdf
    • http://eqtna.com/uploads/1/3/0/2/130273753/8564936.pdf
    • http://fireflyevent.com/uploads/1/3/1/4/131438086/vovexojamozawop.pdf
    • http://theritzhoteledinburgh.scot/uploads/1/3/0/9/130969044/xonafe-tutofonuminixi.pdf
    • http://blackbirddesigns.net/uploads/1/3/1/3/131381589/gikoratusulaw_vekutono.pdf
    • http://flippedturned.com/uploads/1/3/0/6/130639054/xipapa.pdf
    • http://ktperspective.com/uploads/1/3/0/5/130547659/b4ee6c20d.pdf
    • http://adoptme.info/uploads/1/3/1/4/131454151/35dc4a.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_off00005ee5.bin
05382538e391a75ee78462e2aa393c1842893b5e99e6fc58e813b44c48a17e96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE5 9540 bytes

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