Malicious PDF — malware analysis report

Static analysis result for SHA-256 159e097dd232870e…

MALICIOUS

PDF

35.3 KB Created: 2020-04-11 09:19:36 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 65a56b729d7d8d564a83a885ff0ec035 SHA-1: 1d0542eeeaa941a0e366c2fd1bde9335d30a7e46 SHA-256: 159e097dd232870e4ee260803697b2993bfa0fd957647d9de8c2f6ef9bf18887
96 Risk Score

Malware Insights

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

The PDF contains numerous embedded links to external PDF files and HTML pages, suggesting a link farm or redirection mechanism. The document body, though heavily obfuscated, contains a URL that appears to be a lure for 'Covet fashion hack no human verification'. The presence of multiple external links and the nature of the lure indicate 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://hashtagpositivity.academy/uploads/1/3/0/6/130640057/130640057.html#covet+fashion+hack+no+human+verifica
    • http://pflagofwinchester.com/uploads/1/3/0/5/130545278/4151983.pdf
    • http://hostmaster.swindoncabs.com/uploads/1/3/1/6/131606222/042952b76747.pdf
    • http://observances.ca/uploads/1/3/1/4/131408209/d5e58.pdf
    • http://amigosroofing.ca/uploads/1/3/0/6/130603785/zofowubawabamup-vobid-guzip.pdf
    • http://michaelvincentmagic.com/uploads/1/3/0/6/130620510/583259.pdf
    • http://xselectricaltraining.com/uploads/1/3/1/0/131070926/zutosatugejisugi.pdf
    • http://thekatichs.com/uploads/1/3/0/2/130291523/nuzezapar.pdf
    • http://adelaidespecialistcoordination.com/uploads/1/3/0/7/130739061/f2f258199be79a1.pdf
    • http://danshalloweenparty.com/uploads/1/3/1/3/131383790/9229242.pdf
    • http://visitblackberrycreek.com/uploads/1/3/0/7/130739377/7145750.pdf
    • http://chasinghappy3.com/uploads/1/3/0/8/130814007/9706523.pdf
    • http://gausedcarstore.com/uploads/1/3/0/4/130483871/bedifitix-vobazufifosuzus-juxajumubop.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_off000062ad.bin
394736e35ff2f87210fa1469aa9b6531715f351efc92e23cc7fe2d3de497ff47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62AD 7352 bytes

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