Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d68010a7668c02a…

MALICIOUS

PDF

33.9 KB Created: 2020-04-10 23:58:10 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 09995342db487ff9b357e9e975baafdf SHA-1: 8b6710787caa6028f0c9f56e5cf9345befb06157 SHA-256: 7d68010a7668c02a92ed6b39e5b6dca51c27d42d86d8b9302238379a8886676a
96 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which are hosted on domains that appear to be part of a link farm, suggesting a malicious intent to redirect users. The document body text, though obfuscated, includes a URL that mimics a download link for 'Tubemate video downloader for youtube', serving as a lure. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a phishing or content-luring 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://stdavidscottage1.com/uploads/1/3/1/3/131383998/131383998.html#tubemate+video+downloader+for+youtube
    • http://design-tecs.com/uploads/1/3/1/4/131437333/f67ddf5d357582.pdf
    • http://realestate-impossible.com/uploads/1/3/0/8/130813848/wamide.pdf
    • http://shaishriki.com/uploads/1/3/1/4/131453216/799ebde64.pdf
    • http://knowledgeuniversity.org/uploads/1/3/0/5/130588191/fukowuribejo.pdf
    • http://greenleafusa.org/uploads/1/3/0/7/130738903/xowisuroroxogo-misekawaxe-kokowivozu-nagujedu.pdf
    • http://toyota-tacoma.org/uploads/1/3/0/4/130476791/f345b55606.pdf
    • http://daisyeco.mobi/uploads/1/3/0/4/130476161/6082487.pdf
    • http://justshortribs.com/uploads/1/3/0/3/130323302/nixurusebute.pdf
    • http://hcanalesrojas.com/uploads/1/3/0/8/130813769/kodixajuwarixego.pdf
    • http://kempsterconsultants.org/uploads/1/3/1/4/131453650/6588226.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://www.adobe.com/).Noto
    • http://www.google.com/get/noto/http://www.adobe.com/type/This
    • http://scripts.sil.org/OFLNoto

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000527d.bin
e5dc23f577d01ea9934f9e2ec8a4bcd9afd3c705d39802bc71b16cbd7013bed6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x527D 6936 bytes
font_01_sfnt_off00006dbe.bin
399f11620155943aebfe0b638afeaa358d88c62598a0557a7aec8f983decb33a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DBE 4332 bytes

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