Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ed6bf65df44a19e…

MALICIOUS

PDF

38.9 KB Created: 2020-04-02 02:09:25 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: da6ab82aa6d946f570e2c7ed2b903fa2 SHA-1: 2d896ae189dc6be72d47611a252d8b78925e0ab5 SHA-256: 0ed6bf65df44a19e042878e34a79baa9d11c752a903bdd7b84a257c8cda39011
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 used to distribute malicious content. The presence of the 'PDF_SEO_LINK_FARM' heuristic firing strongly supports this assessment. While no scripts were explicitly extracted, the embedded URLs themselves are the primary indicators of malicious intent, likely leading to further stages of infection or phishing content.

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://keatingphysicaltherapy.net/uploads/1/3/1/4/131453215/131453215.html#procweb+jfrj+jus+br+portal+login
    • http://americanbeachphoto.com/uploads/1/3/0/6/130639914/181481e1c424.pdf
    • http://bethslattery.com/uploads/1/3/0/7/130740440/0b44dd7bd.pdf
    • http://multifamilyfiber.com/uploads/1/3/1/0/131071188/e79331.pdf
    • http://browsenodeinfo.com/uploads/1/3/0/4/130435925/nitadejudilegubunute.pdf
    • http://topteampainting.com/uploads/1/3/1/3/131380875/vetup.pdf
    • http://international-snowball.com/uploads/1/3/1/0/131070852/d793b644fb6c3.pdf
    • http://cdizzlerocks.com/uploads/1/3/0/5/130551258/dbd870a5.pdf
    • http://blessyourhearthbooks.com/uploads/1/3/0/8/130813714/xupegurinizekerapub.pdf
    • http://sehr-geehrte-damen-und-herren.info/uploads/1/3/0/3/130379181/sodugoxuse.pdf
    • http://office-zagreb.com/uploads/1/3/0/3/130323932/kupejesamif.pdf
    • http://nathannasbymusic.com/uploads/1/3/0/9/130969236/resejope.pdf
    • http://worklifeconnection.com/uploads/1/3/0/5/130547024/965582.pdf
    • http://jlelitemachining.com/uploads/1/3/0/3/130379105/744807.pdf
    • http://isclinical.net/uploads/1/3/0/9/130969192/fodagefojolemi.pdf
    • http://fromtheclinic.org/uploads/1/3/0/4/130483842/lekegijul-bozurox-luwowax-sojibi.pdf
    • http://tgfnracing.com/uploads/1/3/0/3/130379243/2719839.pdf
    • http://techupsmart.net/uploads/1/3/1/4/131455072/3552829.pdf
    • http://northeastwisconsinwelding.com/uploads/1/3/0/2/130291996/goraz.pdf
    • http://wine-oh-tours.com/uploads/1/3/0/5/130539642/4201429809b1.pdf
    • http://mrmanateepoolservice.com/uploads/1/3/1/3/131397989/4b03f.pdf
    • http://norfolkphysicaltherapy.com/uploads/1/3/0/2/130291908/228804.pdf
    • http://geminicarpentrycontracts.com/uploads/1/3/0/2/130288962/794753.pdf
    • http://hosleychapelcme.org/uploads/1/3/0/7/130776605/4866035.pdf
    • http://besthairreplacementnc.com/uploads/1/3/0/2/130292179/vudulov_pezajote_fibarotipobe.pdf
    • http://arefianatelier.com/uploads/1/3/0/7/130739740/2004761.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_off00006c6a.bin
7d708ea9cac298ef731ef1846bab2b70b46a2a5e675e9f8e6bd907d63e5412cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C6A 9280 bytes

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