Malicious PDF — malware analysis report

Static analysis result for SHA-256 729e132adce5608f…

MALICIOUS

PDF

50.8 KB Created: 2020-04-11 02:06:41 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e357b22a7f08da82ce2efba9cb93fb18 SHA-1: b7b1d426c23a1fa8fc94eec5407b9f1ad363f7ee SHA-256: 729e132adce5608f938db981028c54119ee2af7fba9dc2ca3df0190a775df2ff
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a heuristic firing for a link farm, indicating a high volume of external links, many of which point to other PDF files. The document body text, though partially obfuscated, references "Ocean city new years eve" and includes URLs that are likely part of this link farm. This suggests the document's primary purpose is to redirect users to potentially malicious or SEO-manipulated content.

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://oakclass.com/uploads/1/3/0/6/130620971/130620971.html#ocean+city+new+years+eve
    • http://goldenconceptsllc.com/uploads/1/3/1/4/131453226/8448048.pdf
    • http://shopmoxxly.com/uploads/1/3/0/6/130621496/345919.pdf
    • http://bestficoscore.com/uploads/1/3/0/7/130776296/suladilemar_laravizisujijol.pdf
    • http://cookevillewelcomesall.com/uploads/1/3/1/0/131070152/folakikujakijowif.pdf
    • http://reinkelawoffice.com/uploads/1/3/0/6/130605146/lojale-lutakun.pdf
    • http://myjhakhamarjewerly.com/uploads/1/3/0/4/130477613/1958800.pdf
    • http://whatsyouredge.biz/uploads/1/3/0/2/130272591/xibopuvido.pdf
    • http://withyouinmindresaleshoppe.com/uploads/1/3/0/7/130776811/8547191.pdf
    • http://annettechoi.com/uploads/1/3/0/6/130621552/liwozi.pdf
    • http://pettygalclothing.com/uploads/1/3/1/4/131453232/96da7b15.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_off00009e5f.bin
e0f7ebb9912dcf00af394ad96462d273aacc8e39ac0807ba92250c078f5c7153		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E5F 8756 bytes

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