Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb6173741cf6be66…

MALICIOUS

PDF

47.9 KB Created: 2020-06-09 23:26:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 347b5f098c91acb6d44fb5fc487eee36 SHA-1: fcda708c1650f1e5b31ef4c260f92bc760f01829 SHA-256: fb6173741cf6be66074cc3ad3e3893fbbb3eec4679c3b3cf26ad33b47572cce0
94 Risk Score

Malware Insights

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

The PDF file was identified as malicious by an ML classifier with high confidence. It contains a large number of external links, many of which point to domains that appear to be part of a link farm designed for SEO manipulation. The primary URL, http://royalvacationtravel.voyagerwebsites.com/uploads/1/3/1/4/131437578/131437578.html#classe+ii+de+angle+divis%25C3%25A3o+2, is likely a lure to a malicious site. The document body contains garbled text and metadata indicating it was generated by wkhtmltopdf.

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://royalvacationtravel.voyagerwebsites.com/uploads/1/3/1/4/131437578/131437578.html#classe+ii+de+angle+divis%25C3%25A3o+2
    • http://hbeatz.com/uploads/1/3/0/6/130640125/b8efb9.pdf
    • http://mexicanogrill2.com/uploads/1/3/1/4/131438348/81e9559c9.pdf
    • http://sudburychiropractor.ca/uploads/1/3/0/5/130542996/girolone.pdf
    • http://socialbrews.com/uploads/1/3/0/2/130287977/wukoxorufafebe-butivogafifumel-kotod.pdf
    • http://euclidstratum.net/uploads/1/3/0/7/130775404/1905750.pdf
    • http://firewall.stfrancisxavierschool.org/uploads/1/3/1/3/131398356/8585dc.pdf
    • http://mariodigiovanni.com/uploads/1/3/1/3/131398113/dunajadenuxaduv.pdf
    • http://lindabennettpennell.com/uploads/1/3/1/4/131453177/3801059.pdf
    • http://wolfecityhomecoming.com/uploads/1/3/0/3/130379049/vigira.pdf
    • http://wscre.com/uploads/1/3/1/3/131381166/garibiwizit.pdf
    • http://cambridgeasparagus.org/uploads/1/3/2/3/132302936/texozi-sapesuragojil-jepusek-fozowuvowubod.pdf
    • https://lulirobumof.files.wordpress.com/2020/06/livitiwe.pdf
    • https://divotuzilora.files.wordpress.com/2020/06/dekatubusiremunidiropow.pdf
    • https://mopugatux.files.wordpress.com/2020/06/soxite.pdf
    • https://ruzulujaso535019409.files.wordpress.com/2020/06/35188282825.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_off00008be7.bin
70f695aec27effbfa5ad48874f330305d412a6fd4e56374a90aa5e8789b248e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BE7 12424 bytes

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