Malicious PDF — malware analysis report

Static analysis result for SHA-256 85ed711b6a71b006…

MALICIOUS

PDF

44.7 KB Created: 2020-03-20 08:52:24 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-25
MD5: 762ec8d46fa86ab54f29a3704bc24d22 SHA-1: 9978f51efae770c37d619bd76205d1f4789b1a0f SHA-256: 85ed711b6a71b006ae3b7d0699f7df7de237d301942bb4f592ff2752f8590b89
96 Risk Score

Malware Insights

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

The PDF document contains numerous external links, indicating a likely SEO link farming or redirection scheme. The embedded content, though partially corrupted, references a formula for calculating the area of a circle and includes URLs pointing to other PDF documents and HTML pages. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a 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://cardsmovinginc.com/uploads/1/3/0/2/130271128/130271128.html#formula+para+calcular+la+area+del+circulo PDF link annotation
    • http://www.the-handy-services-market.com/uploads/1/3/0/6/130621214/fazenutawixu.pdfIn PDF document text
    • http://martinent.org/uploads/1/3/0/4/130489044/suparanemezon.pdfIn PDF document text
    • http://mfgm.de/uploads/1/3/0/6/130603931/wajojeberoliwe.pdfIn PDF document text
    • http://babygearrentalslu.com/uploads/1/3/0/2/130289229/bepekivikozopin.pdfIn PDF document text
    • http://kayakakaylee.com/uploads/1/3/0/5/130545333/ganina_fatav_dibuf.pdfIn PDF document text
    • http://msielectricalsupplies.com/uploads/1/3/0/6/130621905/7371430.pdfIn PDF document text
    • http://tanvirsidhu.com/uploads/1/3/0/4/130436415/laboxet.pdfIn PDF document text
    • http://remade.info/uploads/1/3/0/5/130538949/kudomimozumuwo.pdfIn PDF document text
    • http://bellastar.net/uploads/1/3/0/7/130775726/zajad.pdfIn PDF document text
    • http://sgdpress.com/uploads/1/3/0/7/130739347/9ba370f013e39.pdfIn PDF document text
    • http://visitcc.fun/uploads/1/3/0/2/130272377/4012207.pdfIn PDF document text
    • http://mytryshyn.com/uploads/1/3/0/7/130739387/395136.pdfIn PDF document text
    • http://webdisk.dicksonarchitecture.com/uploads/1/3/0/7/130739080/xuwosidu-kuzeg-xebupubirojizi.pdfIn PDF document text
    • http://sadini.net/uploads/1/3/0/5/130590163/rakokajagoritosusedi.pdfIn PDF document text
    • http://datprepcloud.com/uploads/1/3/0/7/130776695/zuzefafesa-pogelomojodas-vifusurola.pdfIn PDF document text
    • http://www.theviolinclub.co.nz/uploads/1/3/0/7/130738658/6e24202a00033.pdfIn PDF document text
    • http://www.friedrich-mack.com/uploads/1/3/0/3/130324065/2532392.pdfIn PDF document text
    • http://222.jillwilsonphotographyllc.com/uploads/1/3/0/6/130604283/notikexufusip_zapujasukibu_xopuvejezap.pdfIn PDF document text
    • http://technolearningrugo.com/uploads/1/3/0/9/130969971/94bc350e9fd18.pdfIn PDF document text
    • http://www.happybellyf2f.com/uploads/1/3/0/7/130775106/milariligebat.pdfIn PDF document text
    • http://dreamcatalyst.org/uploads/1/3/0/5/130540604/cefa206.pdfIn PDF document text
    • http://www.prakashayoga.com/uploads/1/3/0/5/130550736/zuvurefa_tevaligevovode_sojubitok.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_off000078b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78B9 8956 bytes
SHA-256: 0d455d5028bab639fbe6e8d4fe179213faca9e344d9ea2257695b3f678df4000
font_01_sfnt_off00009929.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9929 2788 bytes
SHA-256: 985cbd9ba5b629f1b749d04d852c0eecb5d8ad374186a1044a60da9476420dc6

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