Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dac3f095432336d…

MALICIOUS

PDF

58.6 KB Created: 2020-05-20 13:31:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ca74e12838cf1bd2cdbc0add4d476ac SHA-1: 65e5e24148ca61b2e96b1c7f0c80f9d6fb8422c1 SHA-256: 2dac3f095432336d7139dbae623317aaf7f5e73b2c944bd436a930886d7672a3
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, many of which point to other PDF files on different domains. This pattern is indicative of a link farm or redirection scheme designed to obscure the ultimate destination or distribute malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent. No scripts were extracted, limiting the analysis of direct execution capabilities.

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://thebusinesstip.com/uploads/1/3/1/8/131856476/131856476.html#the+bachelor+season+21
    • http://jardinesexecutivetravel.com/uploads/1/3/0/6/130640194/c7d45.pdf
    • http://nerdpwr.com/uploads/1/3/1/6/131636978/fuvigasexi-xejusi.pdf
    • http://allianceagonline.com/uploads/1/3/0/5/130551247/3694810.pdf
    • http://socaldigitalsolutions.com/uploads/1/3/0/2/130271259/9106924.pdf
    • http://d4sav.live/uploads/1/3/0/9/130969322/b4f0a39b9a45bd.pdf
    • http://success-culture.com/uploads/1/3/1/4/131454237/4722269.pdf
    • http://nickschaadt.com/uploads/1/3/1/3/131379759/0f977.pdf
    • http://campoutbrand.com/uploads/1/3/0/4/130489359/luvukuresufavu_japuvesa_lifal_legijifu.pdf
    • http://joinhamlet.com/uploads/1/3/0/6/130603978/fuzumok.pdf
    • http://tgpaintersmaine.com/uploads/1/3/1/6/131637546/135c890ffc148.pdf
    • http://smiledefenders.org/uploads/1/3/1/3/131398133/jilozi_rawomuxoxufaki.pdf
    • http://eileenjennings.com/uploads/1/3/1/4/131438556/2609909.pdf
    • http://voetbalfan.online/uploads/1/3/0/8/130874541/8505b50d514edb2.pdf
    • http://landwireless.com/uploads/1/3/1/8/131856813/8edcf88.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b939.bin
3f0fc1347895a44e9989b7ac6b87935f3732285c930797434787fa9bc5ea09f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB939 11012 bytes

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