Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec49b1deeb939e5b…

MALICIOUS

PDF

36.8 KB Created: 2020-04-01 11:28:55 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0d50f31d42a856b90cd2966bef168924 SHA-1: 8aa1d32ab92ab1c4210c9b7a9c5fd4629d33a274 SHA-256: ec49b1deeb939e5b8ca0b13548bccddd4b49a40ff392bd908cce0f2b7e0e05d3
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though heavily obfuscated, contains a URL that matches one of the extracted links. This suggests the primary purpose is to direct users to a network of websites, likely for SEO spam or to host further malicious content. No scripts were extracted from this sample.

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://regenerativedesignservices.com/uploads/1/3/0/2/130289480/130289480.html#calories+in+chocolate+glazed+dunkin+donut
    • http://brianprenderville.com/uploads/1/3/0/4/130483248/pojujema-wowepowikuzuget-nolenonam.pdf
    • http://tedramillan.com/uploads/1/3/0/8/130814387/1097338.pdf
    • http://belowthemoon.com/uploads/1/3/0/2/130272629/8321994.pdf
    • http://apiediavenue.com/uploads/1/3/1/1/131163705/6061334.pdf
    • http://keren-s.com/uploads/1/3/0/6/130639578/e8a2f330d9a2.pdf
    • http://lattematte.com/uploads/1/3/0/6/130639105/7247231.pdf
    • http://is-supplies.com/uploads/1/3/0/6/130639837/106ef9a5b125187.pdf
    • http://geasgaidhlig.com/uploads/1/3/0/2/130273624/kusejusibamumezine.pdf
    • http://melissastewart.com/uploads/1/3/0/5/130588151/tugiv.pdf
    • http://teacherplc.com/uploads/1/3/0/4/130476143/somipavusava.pdf
    • http://shpreston.com/uploads/1/3/0/7/130740292/gijutavagiturul_witavuwe_gedusarowo_fugubowowomix.pdf
    • http://wyomingenergycouncil.org/uploads/1/3/0/7/130738732/fuvipivek-pudipujazototor.pdf
    • http://ochinlearningforum.net/uploads/1/3/0/6/130604244/8632251.pdf
    • http://beeoesch.com/uploads/1/3/0/7/130775294/sibexajiwakemejemo.pdf
    • http://hardscapesnd.com/uploads/1/3/0/6/130639508/gefizi.pdf
    • http://postexpressions.com/uploads/1/3/0/7/130775009/7879992.pdf
    • http://elisabeautystore-agency.fr/uploads/1/3/0/7/130775034/bumegax_reboketupe_bugikonu.pdf
    • http://justmybooks.com/uploads/1/3/1/3/131398377/voved-fulam-dutuxoxexidi.pdf
    • http://keepitrealparenting.com/uploads/1/3/1/4/131453858/wuzuwadi.pdf
    • http://india108.com/uploads/1/3/0/5/130543740/85306575824.pdf
    • http://niragiracommunitydevelopment.ca/uploads/1/3/0/6/130603900/4064684.pdf
    • http://cannapetmeds.org/uploads/1/3/0/3/130323538/8ea6b.pdf
    • http://groupementdespompesfunebresmusulmanes.com/uploads/1/3/1/4/131407036/komosebo.pdf
    • http://stratasavvy.net/uploads/1/3/0/7/130739326/8142193.pdf
    • http://stratasavvy.net/upl
    • 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_off0000685c.bin
77e40067b62af6b94b522a8e6f792b53cd7a8d0e892c1ba745c22b5b34f81b42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x685C 6780 bytes

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