Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ffb93e1c99f561b…

MALICIOUS

PDF

34.4 KB Created: 2020-04-06 02:47:00 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 650a4179fc2a61205390bfd1a000ed88 SHA-1: 873a0667eb67e461a1e7aa0d43ed130895bc97de SHA-256: 7ffb93e1c99f561b6a0463f56aa90b6d229db849a413684b4babd9937ecca517
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external URLs, indicating a potential link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links suggests an attempt to direct users to potentially harmful content or to manipulate search engine results. No scripts were extracted, but the PDF structure and URL distribution are highly suspicious.

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://myamazonuk.com/uploads/1/3/0/7/130739530/130739530.html#nursing+care+plan+for+hemothorax PDF link annotation
    • http://coastalcredentialingsolutions.com/uploads/1/3/0/2/130288318/nojomerotajarag.pdfIn PDF document text
    • http://notariousa.com/uploads/1/3/0/2/130272250/takipog_guzavu_winimur_saxixegit.pdfIn PDF document text
    • http://thietkecanhquan.org/uploads/1/3/0/7/130739480/wisabozokojis_jobapuz_debuvubina.pdfIn PDF document text
    • http://shaka1652photos.com/uploads/1/3/0/6/130603942/7513516.pdfIn PDF document text
    • http://museofyourownmaking.com/uploads/1/3/0/4/130483122/kilasuvomo.pdfIn PDF document text
    • http://isawipfli.net/uploads/1/3/0/7/130776585/japovoz_sifajogis_vuduvivuva_sarase.pdfIn PDF document text
    • http://drannettewestministries.com/uploads/1/3/0/7/130739169/rurax_resege.pdfIn PDF document text
    • http://webdisk.collegedemsatiu.com/uploads/1/3/0/8/130874157/vovomulutowixo-bolew.pdfIn PDF document text
    • http://nataliemerritts.net/uploads/1/3/0/7/130740146/mofivegepujusesorix.pdfIn PDF document text
    • http://nedcurcargo.com/uploads/1/3/0/6/130604114/gobutud_rivekewuv_novureluxogaxuz_jixapa.pdfIn PDF document text
    • http://liferr.app/uploads/1/3/0/8/130874439/4286369.pdfIn PDF document text
    • http://cocovonbonbon.com/uploads/1/3/0/2/130289246/roduwuvojosugu_jixepuxigoxef_vawavuxi.pdfIn PDF document text
    • http://aomhm.org/uploads/1/3/1/4/131437516/sowuxabix-dulemanaj-wuriwuvipi-modulax.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
🗂 Part of campaign: brhrealestatemarketing.com 7 samples

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E35 7716 bytes
SHA-256: 7af6e5043ec56115bd3ce167660e86d8b8a2c697844f30c82bdce123aa2e950d