Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b9e0e3ef2c96b34…

MALICIOUS

PDF

35.9 KB Created: 2020-04-03 06:00:29 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-10
MD5: 6392af31154319058deb2e2f6a381280 SHA-1: 487472020739f40ee44132f4731f5ae4086b4dfd SHA-256: 9b9e0e3ef2c96b34099d10dda7485f36a3b1b44e0d8c37d1c5fa07eaa749be08
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, many of which are hosted on domains that appear to be part of a link farm. The document body text, though partially corrupted, suggests a lure related to a math book answer key. The primary attack pattern involves directing users to these external URLs, which likely host malicious content or further phishing attempts. No scripts were extracted from this sample.

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://moonlumen.net/uploads/1/3/0/5/130539022/130539022.html#respuesta+del+libro+de+matematicas+6+grado+paco+el+chato PDF link annotation
    • http://jameswagner.net/uploads/1/3/0/6/130622033/1798675.pdfIn PDF document text
    • http://ww.royalanimalhealthuniversity.com/uploads/1/3/0/6/130620417/zasusuxaloferupof.pdfIn PDF document text
    • http://jeritaylordesigns.com/uploads/1/3/0/5/130588672/tegix-jowilome-gunovavud.pdfIn PDF document text
    • http://morganhomesliving.com/uploads/1/3/0/6/130622033/zojerufefaduga-dewawitutuvuro-xopubinalit-lowujam.pdfIn PDF document text
    • http://ashevilleketamine.com/uploads/1/3/0/7/130775630/tojago-nasiwinuxojavo-lekodupitur-sabuxutakave.pdfIn PDF document text
    • http://donachelabeer.com/uploads/1/3/0/4/130476255/073a7d5ab5c.pdfIn PDF document text
    • http://kbtinting.com/uploads/1/3/1/1/131164275/fujarowinaveximu.pdfIn PDF document text
    • http://ecologicalgenomics.net/uploads/1/3/0/8/130874128/5635287.pdfIn PDF document text
    • http://2apples2oranges.net/uploads/1/3/0/5/130540746/5794344.pdfIn PDF document text
    • http://jjartmedia.com/uploads/1/3/0/6/130621153/mojogojupedisoson.pdfIn PDF document text
    • http://valiantinnovations.com/uploads/1/3/0/7/130739871/1b2c630535.pdfIn PDF document text
    • http://joshuacogswell.com/uploads/1/3/0/6/130639051/c68aa20708.pdfIn PDF document text
    • http://britelaundrycenter.com/uploads/1/3/0/4/130476671/wobomokazisu.pdfIn PDF document text
    • http://bckodalychoir.com/uploads/1/3/0/9/130969817/5033989.pdfIn PDF document text
    • http://tekadocesgourmet.com/uploads/1/3/1/1/131164549/aa4a1f184420d.pdfIn PDF document text
    • http://safebeautymovement.org/uploads/1/3/1/3/131381640/jogakuj.pdfIn PDF document text
    • http://paparazzihunter.com/uploads/1/3/0/3/130323594/zupegazujovate.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

Related samples 2

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6025 8740 bytes
SHA-256: bbf90175eb991d170bf9fe6b854fb7ece5943adf85e48f1f9cff5d3c22c26e33

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