Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b3e72a7551675e9…

MALICIOUS

PDF

42.8 KB Created: 2020-03-30 19:01:35 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 16ef40d4b5995dfe6852d8fc247229db SHA-1: 52504eaa9f711648d1aca9f3149accf9eb28ed0e SHA-256: 6b3e72a7551675e9d566d435b70f901b84f8fadbba05c7effe6e02f0861a7c24
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The document body, though partially obfuscated, contains a URL that points to a seemingly educational resource, likely a lure to encourage users to click on the numerous other links. These links likely lead to malicious content or further stages of an attack. No scripts were extracted, but the structure suggests a phishing or SEO spam campaign.

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://cinderellascleaningcompany.com/uploads/1/3/1/4/131437822/131437822.html#movimiento+parabolico+de+proyectiles+ejercicios+resueltos
    • http://sunstonepottery.com/uploads/1/3/0/5/130590029/17c6436f17.pdf
    • http://velocitypartners.ca/uploads/1/3/0/5/130551597/zizidovalas_pufakevikega.pdf
    • http://revisionfitness24.com/uploads/1/3/0/5/130589032/lowuropefinefag.pdf
    • http://lashedbyqueenb.com/uploads/1/3/0/6/130604632/wibimo_zukesubedinorej.pdf
    • http://hoppes.us/uploads/1/3/0/2/130289395/2ca6a89a3d7b.pdf
    • http://300davidsonavenue.com/uploads/1/3/0/3/130323642/1035256.pdf
    • http://titletownmovers.net/uploads/1/3/0/2/130289201/4266521.pdf
    • http://oakbendcommons.com/uploads/1/3/1/3/131380063/kalutomujux-doxorav-suxulamoremi-wefinom.pdf
    • http://tedxmanhattancollege.com/uploads/1/3/0/5/130539933/8c45e737.pdf
    • http://cordillerastonedepot.com/uploads/1/3/1/3/131384255/3971165.pdf
    • http://peakeandfrey.com/uploads/1/3/1/3/131380601/3295843.pdf
    • http://luxecakesbytwala.com/uploads/1/3/0/6/130639593/292cb.pdf
    • http://higginsbeachmainerental.com/uploads/1/3/0/2/130273626/e1544b.pdf
    • http://rachelbrownlinguistics.com/uploads/1/3/0/3/130324192/e1b58bb39.pdf
    • http://keabrayenergypartnership.com/uploads/1/3/0/2/130289222/4909447.pdf
    • http://jossboutique.com/uploads/1/3/0/9/130969403/4598983.pdf
    • http://bluetiquestore.com/uploads/1/3/0/7/130775501/3fbccd00cf.pdf
    • http://resultscasemanagement.com/uploads/1/3/1/1/131163909/bibokubijimabin_loved_jonopele.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007289.bin
d2e30239cb3c18378ef9c629b00c0a7c0697ec582d3049675070fbf994e67410		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7289 8316 bytes
font_01_sfnt_off0000910c.bin
59598b843c6dbbd6f844c712fc8ba0218f2c7fc8e8e5c3db32488020cf7f1801		 pdf-font-stream PDF embedded font (sfnt) at offset 0x910C 2852 bytes

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