Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e0f4545aacdc6db…

MALICIOUS

PDF

63.8 KB Created: 2020-03-26 12:24:05 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 4d364a4e6e6ea01050996131ddfb5515 SHA-1: dcd37cfc682e55d55e420f465e946facf0c34dd8 SHA-256: 9e0f4545aacdc6dbc01ba2d3c0612e84ca12bb2d1eb1739f6aa1899c2e521a0a
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique often used for SEO manipulation or to distribute further malicious content. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this pattern. The document body contains garbled text and references to 'wkhtmltopdf', suggesting it was programmatically generated. No scripts were extracted from this sample.

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://cloutfm.com/uploads/1/3/0/2/130289271/130289271.html#perdida+de+carga+tuberia+pex PDF link annotation
    • http://vanessayoung.normanhartleybooks.com/uploads/1/3/0/7/130738929/530236.pdfIn PDF document text
    • http://moosethemorkie.com/uploads/1/3/0/6/130640052/efa114a54f.pdfIn PDF document text
    • http://beautysalonquynh.com/uploads/1/3/0/7/130775825/4d6da525e0e6e.pdfIn PDF document text
    • http://nickumelectric.com/uploads/1/3/0/6/130639720/6cf5d761a92.pdfIn PDF document text
    • http://totesadorbs4cf.com/uploads/1/3/0/6/130621111/vurasa_fupul_xarowaja.pdfIn PDF document text
    • http://39tax.com/uploads/1/3/0/3/130313388/kawizonebe.pdfIn PDF document text
    • http://tanjaandersson.com/uploads/1/3/0/7/130776728/708693.pdfIn PDF document text
    • http://sparksdrone.com/uploads/1/3/0/2/130271004/6888334.pdfIn PDF document text
    • http://ubhari.com/uploads/1/3/0/5/130548152/veratupukibe_ninadipaxaf_tonosiwiveb.pdfIn PDF document text
    • http://lockerbiedoggroomers.com/uploads/1/3/0/4/130435914/vavuxuzadakupanozo.pdfIn PDF document text
    • http://garypalmer.net/uploads/1/3/0/4/130488816/tibameguw.pdfIn PDF document text
    • http://sacramentofencing.net/uploads/1/3/0/2/130272232/modarafinologofin.pdfIn PDF document text
    • http://www.usawholesaleleads.com/uploads/1/3/0/7/130776336/mapopafo_difave_fatabawavuz_vosuxit.pdfIn PDF document text
    • http://anchoredrosesoap.com/uploads/1/3/0/4/130490928/tipidoxokope-pejamixebu.pdfIn PDF document text
    • http://vaiden.xyz/uploads/1/3/0/2/130270897/valoxilimiw.pdfIn PDF document text
    • http://hypnosisbyeva.com/uploads/1/3/0/8/130874384/paduli_wodedefovezexu_jafavi_direb.pdfIn PDF document text
    • http://2mqconsulting.net/uploads/1/3/0/8/130874437/nijedi_dobowumi_kabatabusuxibik.pdfIn PDF document text
    • http://rossloto.site/uploads/1/3/0/8/130814408/xugip_lilesi_deraverilafat_sugen.pdfIn PDF document text
    • http://everydayacresohio.com/uploads/1/3/0/6/130603884/gadigawoxaxome-fibilifemogen-fitipujenifek.pdfIn PDF document text
    • http://melodiousworks.studio/uploads/1/3/0/6/130604388/fefenilebo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://anhxgpo.sites.looka.com/uploads/1/3/0/2/130272414/c432c57d00589.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a84c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA84C 10532 bytes
SHA-256: 55bbbc030d80f9e0f4ef0b56a3dd196c265c6e39ae02b73370f9a6c696ea7e6d
font_01_sfnt_off0000cd9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD9A 3764 bytes
SHA-256: 35b32f3ea1b7739ee1c102a0efd75f0d88ac62e8fb3bb61de45da54c738f0469
font_02_sfnt_off0000da6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6B 16064 bytes
SHA-256: cbadadfc837eb6c758d077217bfbf158a98bdcd4108de75fb9034e1d6a9b9709

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