Malicious PDF — malware analysis report

Static analysis result for SHA-256 9806cc58b2afd4ed…

MALICIOUS

PDF

35.0 KB Created: 2020-04-01 22:53:12 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e93002247fe10e51a186ec21940b3a54 SHA-1: 548033544f55b70df0f6126b92af95035eb7294e SHA-256: 9806cc58b2afd4ede75cf56fcda001298bf9995b35b0feb7e532ded30047a9b1
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files on different domains. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains text related to a book title and authoring application details, suggesting a lure to disguise the malicious link farm. The primary attack pattern involves directing users to these external links, which likely host further malicious content or phishing pages.

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://hyperion-ai.com/uploads/1/3/0/3/130379457/130379457.html#kar%C5%9F%C4%B1la%C5%9Ft%C4%B1rmal%C4%B1+dinler+tarihi+kitab%C4%B1+cevaplar%C4%B1
    • http://calgarybrokerageproposal.com/uploads/1/3/0/6/130639972/4bf5c8.pdf
    • http://rileystefano.com/uploads/1/3/0/6/130604525/2134347.pdf
    • http://constructoranova.com/uploads/1/3/0/7/130739072/0eea548.pdf
    • http://ubuntuhouse.com/uploads/1/3/0/4/130483494/gemekewuru_wazadilafugodag.pdf
    • http://blissful-thinking.net/uploads/1/3/0/8/130814407/4871075.pdf
    • http://rocklanddoula.net/uploads/1/3/0/3/130313113/wupedawemug.pdf
    • http://bellomoconstruction.com/uploads/1/3/0/5/130589158/3cde8738ebf6e1.pdf
    • http://peacefulwarrioryogastudio.com/uploads/1/3/1/3/131379434/9265512.pdf
    • http://epicliving.rocks/uploads/1/3/0/2/130289554/bosojaxizisal.pdf
    • http://mindbody-solutions.net/uploads/1/3/1/4/131438786/saxekinolu.pdf
    • http://912foryou.com/uploads/1/3/0/6/130639224/sobawafivuluvi.pdf
    • http://remnantchurchministries.com/uploads/1/3/0/5/130589006/sefow-nukedigovog.pdf
    • http://peacelovejoy.shop/uploads/1/3/0/7/130775291/xojiwokilofujar.pdf
    • http://coastalauditoryassociates.com/uploads/1/3/0/6/130639093/2e23ebb733f9.pdf
    • http://maapl.net/uploads/1/3/0/6/130604878/wovit.pdf
    • http://70-242-244-196.tcfa.org/uploads/1/3/1/3/131384600/dewag.pdf
    • http://joannatoole.com/uploads/1/3/0/7/130776718/d5a3a1ed6f.pdf
    • http://alphaomegaimf.com/uploads/1/3/0/7/130740414/6981033.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_off00005f31.bin
4dfde945234c27b33d078f5d16410dd9ac41907c196c8958c8fb4292e85ef74d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F31 7936 bytes

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