Malicious PDF — malware analysis report

Static analysis result for SHA-256 64cc554723207950…

MALICIOUS

PDF

40.3 KB Created: 2020-06-04 01:26:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3659a287efb2a1c144965f23e7749fd SHA-1: 018b8d6d6aebdb87eb68dddbdf3b543c3a8b3a9e SHA-256: 64cc5547232079505dba781ca86d909ea5da7bc3b4e95f43f634f81452047073
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to PDF files hosted on various domains, suggesting a link farm or redirection scheme. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs further supports a malicious intent to redirect users to potentially harmful content. The document body contains text related to software downloads, likely a lure.

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://alexoutdoored.com/uploads/1/3/0/6/130620804/130620804.html#paragon+apfs+for+windows+download+to
    • http://maesocial.net/uploads/1/3/0/4/130435905/bibifuxewagidex.pdf
    • http://bottomlinebookkeeping.biz/uploads/1/3/0/5/130589163/lunorovamepoxel.pdf
    • http://ns1.gailswoope.com/uploads/1/3/0/8/130873908/6180080.pdf
    • http://mymlmbiz.com/uploads/1/3/1/6/131606511/gebarutat.pdf
    • http://krausecousa.com/uploads/1/3/0/4/130489909/wezubozafu-xubek-wibigupim-fasezotugemud.pdf
    • http://advancementadvisors.com/uploads/1/3/0/6/130603861/7830898.pdf
    • http://melodiousstringsstudios.com/uploads/1/3/0/5/130550713/d3287.pdf
    • http://vetspicks.com/uploads/1/3/0/4/130476122/8042705.pdf
    • http://andrewsiddoway.com/uploads/1/3/0/8/130873914/ruzos.pdf
    • http://challengedhouses.com/uploads/1/3/0/8/130814459/xuvakir.pdf
    • http://trustcare247.com/uploads/1/3/0/3/130313673/texijodezedagal.pdf
    • http://talsourcingagents.org.uk/uploads/1/3/0/5/130543552/9673b8cf.pdf
    • http://alexoutdoored.com/uploads/1/3/0/6/130620804/terms.html
    • http://alexoutdoored.com/uploads/1/3/0/6/130620804/dmca.html
    • http://alexoutdoored.com/uploads/1/3/0/6/130620804/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://winanufejo.files.wordpress.com/2020/06/13515740984.pdf
    • https://wosibol.files.wordpress.com/2020/06/62419362561.pdf
    • https://kesodisak.files.wordpress.com/2020/06/bajowol.pdf
    • https://zisazoxusu.files.wordpress.com/2020/06/gividefoxogopizegaz.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_off00006da6.bin
c3fbe2d250040308fd71c76175eea50ae9de61921670f018f606348b59127c93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA6 11648 bytes

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