Malicious PDF — malware analysis report

Static analysis result for SHA-256 c637ba3e8bbca702…

MALICIOUS

PDF

50.9 KB Created: 2020-03-29 06:24:03 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0f20410826e1f1db4aa57d7cee99cd94 SHA-1: cbc1d040b8813b723c4f3802815a218ff934b0dc SHA-256: c637ba3e8bbca7026b45496fcc6fdbd7e844a8dffc498dc76428e9eb3c8516bc
94 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The primary purpose appears to be directing users to a variety of websites, potentially for SEO manipulation or to host further malicious content. No scripts were extracted from this sample, limiting the ability to determine specific payload delivery mechanisms.

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://neokundalini.org/uploads/1/3/0/4/130436390/130436390.html#tony+gaddis+c++
    • http://mwflooring.org/uploads/1/3/0/3/130324234/xobobimavi-nejevoz-nidademozokib.pdf
    • http://www.mybottomshelf.com/uploads/1/3/0/6/130604529/zaweves-lexenedagenatot-zoxudasiruxidup.pdf
    • http://composer4media.com/uploads/1/3/0/3/130313170/xezutalajezolut.pdf
    • http://casadebrincar.net/uploads/1/3/0/6/130604798/sagas.pdf
    • http://doctorwash.net/uploads/1/3/0/4/130435966/bujajofuwuxoru.pdf
    • http://michelhb.com/uploads/1/3/0/7/130775293/19125df0.pdf
    • http://belle-donne.com/uploads/1/3/0/5/130539373/mufelunakolit-tojifi-nebosivu.pdf
    • http://actualimpactconsulting.com.au/uploads/1/3/0/6/130621277/8d98a92aa688.pdf
    • http://midlifekrysis.com/uploads/1/3/0/6/130605076/delomisugalamakenawa.pdf
    • http://twinkleandtwinge.com/uploads/1/3/0/2/130288380/5362970.pdf
    • http://webdisk.tlswindsled.com/uploads/1/3/1/1/131164223/virufapidadozariti.pdf
    • http://artmarketingmuse.com/uploads/1/3/0/3/130313634/lumijanimowanen.pdf
    • http://bi4uun.com/uploads/1/3/0/7/130739260/junaxejit-tutowodun.pdf
    • http://mnproperties-id.com/uploads/1/3/0/5/130546574/vulejus.pdf
    • http://sencares.org/uploads/1/3/0/6/130620949/bovotadutufeke.pdf
    • http://www.towels-napkin-ri-1.walnuthilldesignsllc.com/uploads/1/3/0/6/130621579/juzivo_pulabubusiwu_wumekenoganamo_jelinubuto.pdf
    • http://www.retirementrelo.com/uploads/1/3/0/7/130775833/lebebebud-zefisofakesuga-vudaxulerime-nubidepola.pdf
    • http://www.mongoosecpt.com/uploads/1/3/0/5/130550920/buzizotixalifazefara.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_off00009981.bin
6c6cb12c08cef824f38e13999d080abff7f6d56b6411d5bc04419022ac9cdfe2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9981 9296 bytes