Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c0425a777a47197…

MALICIOUS

PDF

28.7 KB Created: 2020-06-01 07:17:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2879ea17a015aba0ebadb6b495c6d8c SHA-1: 26cd625f5c0190f7a4a8b1bdf8499f504fcc3341 SHA-256: 7c0425a777a47197335f75fad92eac3b54c626f7d101161e4e624e5b0d31b902
96 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which point to suspicious domains and are likely part of a link farm or phishing campaign. The document body, while containing a request for financial statements, is heavily obfuscated and likely serves as a lure to encourage users to click on the embedded malicious URLs. The ML classifier strongly indicated maliciousness, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://concreteonthespot.com/uploads/1/3/0/6/130605476/130605476.html#prepare+income+statements+for+both+garcon+company+and+pepper+company
    • http://nwcustomapparel-net.northwestembroidery.com/uploads/1/3/0/6/130639786/povizobem-selezi.pdf
    • http://sugahplumsweetz.com/uploads/1/3/0/3/130379431/givoxawovufozefatevi.pdf
    • http://anagachwoods.org.uk/uploads/1/3/0/3/130313319/nofofofi_tepixajoje.pdf
    • http://mail.ncrdolphins.com/uploads/1/3/0/7/130776898/mevatobamime-wijosoliroji-zewagevifoju.pdf
    • http://spoilism.com/uploads/1/3/0/7/130738950/7027356.pdf
    • http://creditdatareports.com/uploads/1/3/0/3/130379169/6a9691a61a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://kututewopox.files.wordpress.com/2020/05/51359931708.pdf
    • https://soxufososuk.files.wordpress.com/2020/05/mebakesifitudetidexima.pdf
    • https://sesifaruguki.files.wordpress.com/2020/06/zusigumivizetuku.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004737.bin
3ab0eb4a40113bb562624044a47eccfdc67b15b3f79456a690ea98e5ae0d0c80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4737 9408 bytes

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