Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ef8128f97f1de75…

MALICIOUS

PDF

44.1 KB Created: 2020-03-30 08:01:20 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0f1432da6aaf5dab871d3b02023ca581 SHA-1: 5e2d5fb5c261c237aa311b80f0f247c48c6e34e7 SHA-256: 7ef8128f97f1de75f04c7e0a21419df6181dc2ff0485fc3b58b51683ac1a1b09
94 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious Link

The document body contains text related to downloading Office 2013, and the PDF contains a large number of external links, many of which point to PDF files hosted on various domains. This indicates a link farm or SEO poisoning technique designed to lure users to download malicious content. The primary URL suggests a phishing attempt for software. The ML classifier strongly flagged this PDF as malicious.

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://djspizza1.com/uploads/1/3/1/3/131398591/131398591.html#descargar+office+2013+32+bits+gratis+en+espa%C3%B1ol+completo+con+serial
    • http://readwritebake.com/uploads/1/3/0/5/130551765/jefuvipigitevebezis.pdf
    • http://treeoflifecg.com/uploads/1/3/0/9/130969243/dd66cb024e.pdf
    • http://theseaviewcottage.com/uploads/1/3/1/1/131164549/vuxagapakav_bisosawipigebuj.pdf
    • http://idahowildrosefarms.com/uploads/1/3/0/6/130604165/6655837.pdf
    • http://wellnesstravelandtreats.com/uploads/1/3/0/4/130435716/xozipipitewe-supizosiku-dedugufu.pdf
    • http://bonfireministries.net/uploads/1/3/0/7/130774977/6a537840fb36.pdf
    • http://mundofeliz.es/uploads/1/3/0/6/130605504/8225494.pdf
    • http://precisionsprayfoam.net/uploads/1/3/0/7/130776358/31add35f658.pdf
    • http://haingotiananirintsoafitiavan.com/uploads/1/3/0/5/130550763/basunubawen-vufakajasekura.pdf
    • http://andersamundson.com/uploads/1/3/0/9/130969563/nomimajunegusis_rawavusaj.pdf
    • http://malagakw.com/uploads/1/3/0/6/130604425/fodutexunu-pubomavugifek-ragurotu.pdf
    • http://printerpie.net/uploads/1/3/0/5/130588856/wopigapotow-likidokanid-ropoturupig.pdf
    • http://bluegrass-gasket.com/uploads/1/3/0/2/130272083/nulifus_nobatesorono_rulolunugulesew_nelugowubibuba.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_off00007cd0.bin
bd23d716fdaa70793a2462dfec0954424fb691bf62a963899afdbeff546c9c93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD0 9708 bytes

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