Malicious PDF — malware analysis report

Static analysis result for SHA-256 71298cf645f3d763…

MALICIOUS

PDF

50.5 KB Created: 2020-06-05 20:50:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 944c5d68f3be8063260d863c151f83cb SHA-1: bda0c1d67687b606122a67d4c0c52f1e76d7a219 SHA-256: 71298cf645f3d76324d73b23ab3ecd856536a3528bf640f41ea31ef45f0b8f27
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 malicious intent to manipulate search engine results or redirect users to potentially harmful content. The ML classifier strongly indicates maliciousness. While no scripts were directly extracted, the presence of numerous external URLs points towards a phishing or content-farming attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://francescocamuglia.com/uploads/1/3/0/2/130288594/130288594.html#fallout+4+perks
    • http://mail.lightessencedesign.com/uploads/1/3/0/6/130639915/79c0aab8c7.pdf
    • http://mindmappsychology.com.au/uploads/1/3/0/5/130540869/6558346.pdf
    • http://maliyahallen.com/uploads/1/3/0/6/130621359/de3f578cb.pdf
    • http://vonhiem.org/uploads/1/3/0/6/130640144/2527503.pdf
    • http://thewoodlandstax.net/uploads/1/3/0/2/130289652/juniziselijoki.pdf
    • http://nittygrittydetailing.com/uploads/1/3/0/7/130739206/e27e16.pdf
    • http://francescocamuglia.com/uploads/1/3/0/2/130288594/terms.html
    • http://francescocamuglia.com/uploads/1/3/0/2/130288594/dmca.html
    • http://francescocamuglia.com/uploads/1/3/0/2/130288594/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://jizogozup.files.wordpress.com/2020/06/32355931225.pdf
    • https://rigubagos619757990.files.wordpress.com/2020/06/limisuvudabekazunekonop.pdf
    • https://zezegitag.files.wordpress.com/2020/06/goligerivulabova.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://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009a95.bin
a7fe1145a736e286065a6270588c59b2ba797f69269f67856d69d9d2883a2544		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A95 10500 bytes

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