Malicious PDF — malware analysis report

Static analysis result for SHA-256 7569f9216039bc52…

MALICIOUS

PDF

39.5 KB Created: 2020-03-29 08:56:40 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f9c8d0dff90065db1377c2968853899d SHA-1: 09c810a59ce5d0bfe0824ecb46d160c6c9d773a5 SHA-256: 7569f9216039bc52354987b133edc911580457b7e82b8816f7bcc449ceba029f
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files hosted on various domains. This pattern is indicative of SEO spam or a link farm designed to distribute malicious content or drive traffic. The ML classifier strongly supports the malicious verdict.

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://adsl-63-204-18-8.benefitplans.org/uploads/1/3/0/7/130739026/130739026.html#teoria+de+decisiones+estadisticas
    • http://www.funkysignsdoylestown.com/uploads/1/3/0/7/130775977/nigerizeno.pdf
    • http://grwcreative.com/uploads/1/3/0/9/130969925/4174263.pdf
    • http://voicemailstudios.com/uploads/1/3/0/6/130620971/bozapafexux.pdf
    • http://v-24.micim.com/uploads/1/3/0/7/130740265/1114895.pdf
    • http://cyclorise.co.uk/uploads/1/3/0/4/130489933/luforitanezupevel.pdf
    • http://iscribe4u.com/uploads/1/3/0/3/130323984/1acedbdf.pdf
    • http://idhabbo.org/uploads/1/3/0/7/130740364/f58a234d.pdf
    • http://piscesusa.piscesenterprises.com/uploads/1/3/0/4/130489914/sufewis.pdf
    • http://christopherstangle.com/uploads/1/3/0/2/130288551/dipojurenifodifu.pdf
    • http://nectr.ca/uploads/1/3/0/3/130323724/d0f50ab96.pdf
    • http://www.rosemarieromero.com/uploads/1/3/0/6/130603847/woluvurabokad.pdf
    • http://fortyouthtriathlon.com/uploads/1/3/0/7/130776006/timudulejumut.pdf
    • http://3oceanfive.com/uploads/1/3/0/5/130551226/9482314.pdf
    • http://gripitgloves.com/uploads/1/3/0/8/130874073/dddf55a8f6df.pdf
    • http://purensimpleohio.com/uploads/1/3/0/5/130544043/zijidalamup.pdf
    • http://www.new.redtagbazaar.com/uploads/1/3/0/7/130775358/munagalaval_kepevut_meverelejotuj.pdf
    • http://kaleoramiah.com/uploads/1/3/0/2/130272579/dekazem.pdf
    • http://webdisk.remedialtherapysolutions.com.au/uploads/1/3/0/6/130639950/tebur-konaxide-vuduselif.pdf
    • http://newsugarmommys.com/uploads/1/3/0/5/130589123/masofefubuwikav.pdf
    • http://popscustomcabinets.com/uploads/1/3/0/3/130379110/xepevub.pdf
    • http://paulsimmonsod.net/uploads/1/3/0/8/130814342/7453855.pdf
    • http://rallypointchurch.org/uploads/1/3/0/7/130739607/dojebelo.pdf
    • http://swiftdynamic.services/uploads/1/3/0/9/130969993/bizimirijoto.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_off00007247.bin
66f38de000271d1a1d1269167293a82888ef4c2dff9ecf09f3c33bb7d9d21177		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7247 8328 bytes

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