Malicious PDF — malware analysis report

Static analysis result for SHA-256 03a1e6aa0524e789…

MALICIOUS

PDF

36.3 KB Created: 2020-03-29 02:38:02 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2442f604afb5be9903917593b591a305 SHA-1: ebf930a8fc00dbde0580576bab607ad08a9f30d9 SHA-256: 03a1e6aa0524e78911e8e6d2b4b7bc72bf40e8e5b274d31c61b7ab10f31f22db
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness, and the presence of numerous external URLs suggests an attempt to lead the user to a compromised or malicious resource. No scripts were extracted, but the PDF structure itself is indicative of a link farm or redirection scheme.

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://ndchair.com/uploads/1/3/0/9/130969599/130969599.html#oakwood+plaza+movie+theater+hollywood+florida
    • http://huanqiuyulecheng.f18.ebkf.org/uploads/1/3/0/6/130604459/9551982.pdf
    • http://nolaninc.net/uploads/1/3/0/5/130539223/5786852.pdf
    • http://comodoristrutturare.eu/uploads/1/3/0/2/130289736/kawezelopufatejo.pdf
    • http://disneysidecelebration.com/uploads/1/3/0/6/130640220/getuxi.pdf
    • http://renmach.com/uploads/1/3/0/4/130477018/jonewefubigiv_pozanitolom_sodedezusod.pdf
    • http://makervet.com/uploads/1/3/0/7/130775982/24493.pdf
    • http://ittohtrid.com/uploads/1/3/0/6/130621912/sepif.pdf
    • http://gsglobalservicesllc.com/uploads/1/3/0/7/130775471/7685262.pdf
    • http://peruschallenge.com/uploads/1/3/0/8/130814713/jaxegiloranesi.pdf
    • http://hellofruits.com.au/uploads/1/3/0/3/130313150/ranivelosoted-penavegakidume-sobafe.pdf
    • http://mentalhealthyouthteacher.com/uploads/1/3/0/2/130289179/1976402.pdf
    • http://gammaudio.com/uploads/1/3/0/3/130379466/menegabi.pdf
    • http://webazoo.com/uploads/1/3/0/5/130539053/bf21a8.pdf
    • http://www.roadtoahomeloan.com/uploads/1/3/0/3/130379219/mavekejopewa.pdf
    • http://meetthenolans.com/uploads/1/3/0/5/130588498/lazofikizef.pdf
    • http://mail.operationfof.org/uploads/1/3/0/7/130776474/nemerariwefigapatun.pdf
    • http://majordecisionco.org/uploads/1/3/0/3/130313198/tuxaxavupep.pdf
    • http://dnjpaydirt.com/uploads/1/3/0/9/130969281/fec9cf992b9.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_off000064ae.bin
1864033baa13fe0fc7c0b2daa24363de5aaaf3acad3e3669915af38e2d9b4a9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64AE 8028 bytes

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