Malicious PDF — malware analysis report

Static analysis result for SHA-256 82d7de9be4405d39…

MALICIOUS

PDF

41.2 KB Created: 2020-03-29 01:52:39 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: a81600baf0b5715909cfc6c3ef82f4c6 SHA-1: 4aaedd5f618f5fdc92f9a9f3ce32398914d07995 SHA-256: 82d7de9be4405d397f6085b145fc40ec24c81c3236e894439c03361abf679268
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting an attempt to manipulate search engine results or redirect users to potentially malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of numerous URLs points towards a content-luring or redirection-based attack.

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://74-123-77-252.mgwnet.com/uploads/1/3/1/3/131380299/131380299.html#pioneer+sx+626+manual PDF link annotation
    • http://body-better.com/uploads/1/3/0/7/130774993/2229053.pdfIn PDF document text
    • http://www.smiledefenders.net/uploads/1/3/0/2/130272859/2679175.pdfIn PDF document text
    • http://cincinnatidesignstudio.com/uploads/1/3/0/6/130639517/vemapo.pdfIn PDF document text
    • http://chrisusey.com/uploads/1/3/0/5/130550931/merevifafipuw_ridejunogopuzel_dinonutigexaf_tugipaxa.pdfIn PDF document text
    • http://derekbrowell.com/uploads/1/3/0/5/130545087/xakomidus.pdfIn PDF document text
    • http://triplex-arrow.com/uploads/1/3/0/5/130547418/sogezumutedazufi.pdfIn PDF document text
    • http://samwisemagic.com/uploads/1/3/0/6/130620684/gaxafi_xevogokatoniwex_vidat.pdfIn PDF document text
    • http://makeovermondaynj.com/uploads/1/3/0/4/130489162/nejilabe_tuwafi_pobukanemazaveg_vedeli.pdfIn PDF document text
    • http://sandyhookmachineshop.net/uploads/1/3/0/4/130488308/wuwagefipuwid.pdfIn PDF document text
    • http://www.dbsvadvogados.com/uploads/1/3/0/7/130775751/3b305dd25585.pdfIn PDF document text
    • http://www.thejourneystudio.net/uploads/1/3/0/2/130289327/jinepun.pdfIn PDF document text
    • http://chewysuz.com/uploads/1/3/0/6/130603997/kojina.pdfIn PDF document text
    • http://madtrucker.net/uploads/1/3/1/4/131408131/zefikoriropora-sawatidikujanum-dazoxiparos-zavan.pdfIn PDF document text
    • http://www.europeansoccerschool.com.au/uploads/1/3/0/7/130775653/1705129.pdfIn PDF document text
    • http://nfloo.com/uploads/1/3/0/8/130874220/telafafofuv.pdfIn PDF document text
    • http://stellaholland.com/uploads/1/3/0/2/130270937/lipixapuwipubofow.pdfIn PDF document text
    • http://mattwood.nyc/uploads/1/3/0/2/130272281/73cf7b7af.pdfIn PDF document text
    • http://southernbellefoodtruck.com/uploads/1/3/0/4/130488786/dejewerox.pdfIn PDF document text
    • http://furtreenewfoundlands.com/uploads/1/3/0/4/130435777/xegofogavikapok.pdfIn PDF document text
    • http://funfithealwellcom.com/uploads/1/3/0/7/130776873/rewabuxixo-jubanunonezaju-suroribikizuk-dididibur.pdfIn PDF document text
    • http://www.townsvillewomen.com/uploads/1/3/0/4/130483219/depegeferosi.pdfIn PDF document text
    • http://worthaminsurancebenefits.com/uploads/1/3/0/4/130436261/ccdac2ab2d8ad.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D36 8368 bytes
SHA-256: b9912265f724e5b8a765e56ee716ae652b5e5abdc4f7b304e716071e9f9f78cd
font_01_sfnt_off00008cbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CBB 2828 bytes
SHA-256: d8435aac11388b8214bfc980e857510ef47481ba706565f25bd6cae8efb01319

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