Malicious PDF — malware analysis report

Static analysis result for SHA-256 27790a45b044188b…

MALICIOUS

PDF

60.2 KB Created: 2020-03-29 10:49:51 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 1398ec299b270191212586683b891f5b SHA-1: b7589572d06b4d29cfd01a8102745eda2ad5e30d SHA-256: 27790a45b044188ba0494df0b4d0261554cb442e365c89260f2cb0709117c04e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of external links, a technique often used for SEO spam or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. The document body itself is heavily obfuscated and contains embedded URLs, further supporting the malicious intent.

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://74-123-75-235.mgwnet.com/uploads/1/3/0/3/130313346/130313346.html#shannon+diversity+index+formula PDF link annotation
    • http://finishings.ca/uploads/1/3/0/5/130540159/xupavesa.pdfIn PDF document text
    • http://vulcanc.com/uploads/1/3/0/3/130379352/miwigumibasi.pdfIn PDF document text
    • http://www.lakecountyrecovers.com/uploads/1/3/0/2/130289353/7942430.pdfIn PDF document text
    • http://www.veryseriousproductions.com/uploads/1/3/0/2/130272406/3b254916bfcd59b.pdfIn PDF document text
    • http://www.canberracalligraphysociety.org/uploads/1/3/0/7/130739583/a6658fd.pdfIn PDF document text
    • http://acabadosyengrasantesdemexico.com/uploads/1/3/0/7/130739012/3492826.pdfIn PDF document text
    • http://holidayfuncruise.com/uploads/1/3/0/4/130483498/nitebugoxozape-todazipemavikub.pdfIn PDF document text
    • http://charismaticdancepaymentcenter.com/uploads/1/3/0/2/130270945/lanedaputibexor-viromuvib-wedegonefixudaz-kipire.pdfIn PDF document text
    • http://www.alliesonthejourney.com/uploads/1/3/0/5/130540401/foxupalazaveveg_binevagasad_povopebagemaxon_zavileme.pdfIn PDF document text
    • http://saskatchewancabinrentals.com/uploads/1/3/1/0/131070364/puxog.pdfIn PDF document text
    • http://naturomedicbw.com/uploads/1/3/0/8/130874672/6772116.pdfIn PDF document text
    • http://malekwilliams.com/uploads/1/3/0/4/130476722/3043308.pdfIn PDF document text
    • http://thrufeedcommunications.com/uploads/1/3/0/9/130969925/d49855d.pdfIn PDF document text
    • http://www.ryanreitzammer.com/uploads/1/3/0/3/130313177/dolajajilisi-dijaribef-bibemararitezad.pdfIn PDF document text
    • http://wingardservices.com/uploads/1/3/0/5/130543453/4209447.pdfIn PDF document text
    • http://nalbarra.com.au/uploads/1/3/0/3/130323232/6960277.pdfIn PDF document text
    • http://askatreeguy.com/uploads/1/3/0/3/130313555/f6c1fd5c279.pdfIn PDF document text
    • http://larsenism.com/uploads/1/3/0/7/130775843/jimowaranizogu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 6

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_off00009ff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FF8 9116 bytes
SHA-256: 778e1aa30016f295d23fe4737eebc15638266ad5759338274594860256c4f2f2
font_01_sfnt_off0000c2a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2A0 3068 bytes
SHA-256: c6f4c4e3489316e83245b4d743e0b8e0877778968a15cf8815fa6ada1c1cd472
font_02_sfnt_off0000cd8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD8E 16088 bytes
SHA-256: 4552b00a254e06eb46935c60e3465877a7d3a19a873bc0dada12464c434cbe82

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