Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d990ff45edca469…

MALICIOUS

PDF

30.3 KB Created: 2020-06-12 07:44:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c258d18d376f1f71cdb7d5530793e1b0 SHA-1: e5f7bdde01af10785b5ea1b9c1fc60b3076b7ce2 SHA-256: 0d990ff45edca469b1e3c0321f6b0b498b959e93d8ad375a1bd8b76dc753cc5b
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files hosted on various domains. This behavior is indicative of a link farm designed to distribute malicious content, likely PDFs containing malware or phishing lures. The ML classifier strongly supports the malicious nature of this document.

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://supercleanequipmentwash.com/uploads/1/3/1/8/131856376/131856376.html#ccna+lab+manual+pdf+2015
    • http://harmonybaptistchurch.com.au/uploads/1/3/0/6/130621946/paduxirumasul-lazar.pdf
    • http://attenhoj.net/uploads/1/3/0/5/130588261/favupi_bafirile_bapigewebuzijaf_bojag.pdf
    • http://keircarpentry.com/uploads/1/3/1/8/131856333/resos-jidugivoxoso.pdf
    • http://jcohunts.com/uploads/1/3/0/6/130640175/5b1e818def3029.pdf
    • http://mailproxy2.stephanglietsch.com/uploads/1/3/0/6/130621101/8034192.pdf
    • http://cpanel.fetefam.com/uploads/1/3/0/6/130621214/gekokonojuwu.pdf
    • http://mccwilltrading.com/uploads/1/3/0/7/130775743/6878919.pdf
    • http://jobsight365.com/uploads/1/3/0/5/130588452/mitader-setuzi-sukapamoduji-pewuduwegedaked.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://taguriku.files.wordpress.com/2020/06/59383486757.pdf
    • https://janavitim807994190.files.wordpress.com/2020/06/55031511945.pdf
    • https://piretevora.files.wordpress.com/2020/06/rugefar.pdf
    • https://zorevuz.files.wordpress.com/2020/06/daruzatojalavowab.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_off00004ce3.bin
a38c46a146d122a9fb1d918aca7d4babcd08c796040ead7bd292065da07a03e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CE3 9696 bytes

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