Malicious PDF — malware analysis report

Static analysis result for SHA-256 86230ecef1f22d45…

MALICIOUS

PDF

26.6 KB Created: 2020-06-10 04:05:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-07-24
MD5: 086481a6543afedf71cb25ae3156415b SHA-1: 2fee3f12ee6327967e6e4dc5ad25eabc99e08523 SHA-256: 86230ecef1f22d4527cc9dd71ad9f565c7b7145a2be352036c96dbe7c5801592
116 Risk Score

Malware Insights

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

The PDF is identified as a malicious screenshot lure, typical of phishing campaigns. It contains numerous external links, including one to an HTML file that likely hosts a phishing page or a second-stage payload. The ML classifier strongly supports the malicious verdict, and the presence of embedded URLs indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 26 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://74-123-72-38.mgwnet.com/uploads/1/3/0/5/130590521/130590521.html#gay+porn+myvidster PDF link annotation
    • http://heartandsound.co.uk/uploads/1/3/1/4/131454057/9359819.pdfIn PDF document text
    • http://twocsflipflops.com/uploads/1/3/0/4/130488574/9376563.pdfIn PDF document text
    • http://lehighvalleyofficiant.com/uploads/1/3/0/2/130272973/86bf4.pdfIn PDF document text
    • http://4fk.undesirable.us/uploads/1/3/0/6/130604996/1a9db2c.pdfIn PDF document text
    • http://stefanotex23.com/uploads/1/3/0/8/130813483/e9fc24e6a38.pdfIn PDF document text
    • http://riannehawkins.com/uploads/1/3/1/8/131858043/8959994.pdfIn PDF document text
    • http://autodiscover.scarboroughmaineyoga.com/uploads/1/3/1/4/131437770/b6cef15bf03a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://puvaperozani.files.wordpress.com/2020/06/93678734240.pdfIn PDF document text
    • https://moribunenola.files.wordpress.com/2020/06/pazidesimijigepa.pdfIn PDF document text
    • https://vivetevu.files.wordpress.com/2020/06/41693174665.pdfIn PDF document text
    • https://riburawonak.files.wordpress.com/2020/06/roxugudop.pdfIn PDF document text
    • https://wupojawafosa.files.wordpress.com/2020/06/85030195701.pdfIn PDF document text
    • https://sosinogezop.files.wordpress.com/2020/06/89055807322.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
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

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_off0000440c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x440C 8112 bytes
SHA-256: 9b9809dfa533a50416376c584a23e097470bd28f06b8ec5ed84431aaf75681cc

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