Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cb9683fea868e62…

MALICIOUS

PDF

37.7 KB Created: 2020-03-21 12:11:05 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-10
MD5: db5314668f7039b572ad9d3cc628eab2 SHA-1: 002ee7f754c9fa3323a6893a2547d8ddd88556d4 SHA-256: 7cb9683fea868e62a9f3a17672f6d36271d2dddf7aa11affb517a645a883cbaa
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or a distribution point for malicious content. The embedded document body text, though heavily obfuscated, contains URLs that are also present in the list of extracted URLs. The ML classifier strongly indicates maliciousness, and the presence of numerous external links points towards a phishing or malware distribution attempt.

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://jessicamcvay.com/uploads/1/3/0/4/130476632/130476632.html#netgear+n600+wndr3400v2+firmware PDF link annotation
    • http://livegirlreview.com/uploads/1/3/0/8/130814070/7715459.pdfIn PDF document text
    • http://internationallysuave.com/uploads/1/3/0/3/130379517/gumeg.pdfIn PDF document text
    • http://cookielovecustomsugarcookies.com/uploads/1/3/0/5/130546457/fusovivo.pdfIn PDF document text
    • http://sshvug.com/uploads/1/3/0/2/130288626/f3dd2655.pdfIn PDF document text
    • http://webdisk.lldmshakopee.org/uploads/1/3/0/2/130272084/4c7259d79.pdfIn PDF document text
    • http://joshua-linder.com/uploads/1/3/0/6/130604467/2e5c55f7160b6.pdfIn PDF document text
    • http://chevallierfamily.org/uploads/1/3/0/4/130489275/fexukafudekenuzawaz.pdfIn PDF document text
    • http://www.whimsicalwinsomes.com/uploads/1/3/0/5/130539287/wozitijifutajax_fadilizovojop.pdfIn PDF document text
    • http://thedevilsmusic.co.uk/uploads/1/3/0/2/130270936/2494660.pdfIn PDF document text
    • http://noraleefashion.com/uploads/1/3/0/5/130543600/4210935.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 1

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_off000067f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67F8 8396 bytes
SHA-256: d87a8a5faef3c4bf61ec86f461b96322f49592997e61dec9cb72aaa035e3d37f

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